Between 23 and 30 weeks connections form between the cerebral cortex and the brain regions that recognize pain sensitivity.
Your cerebral cortex, which is located on top of your cerebrum, is its outer layer. The greatest part of your brain is called your cerebrum. Your brain is split into two hemispheres by your cerebrum. The corpus callosum, a network of nerve fibres, connects the hemispheres together.The brain is a sophisticated organ that manages every bodily function as well as thought, memory, emotion, touch, motor skills, vision, respiration, temperature, and hunger. The central nervous system, or CNS, is made up of the spinal cord that emerges from the brain.The anterior cingulated cortex, insular cortex, prefrontal cortex, thalamus, primary somatosensory cortex (S1), secondary somatosensory cortex (S2), and the insular cortex are some of these areas. These areas comprise the pain neuromatrix that Melzack has described.To learn more about cerebral cortex.
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Multiple lines of evidence indicate that complex multicellularity evolved at least six different times. which of the superkingdoms includes organisms that exhibit complex multicellularity?
Opisthokonta, Archaeplastida, Stramenopila from the superkingdoms includes organisms that exhibit complex multicellularity.
Complex multicellularity appeared comparatively late in life's history, in the Ediacaran Period, more than three billion years after microbial life began to diversify. Plants, animals, and macroscopic fungus form terrestrial landscapes, while creatures and seaweeds animate the water. Complex multicellularity is the most sophisticated degree of biological structure and has only occurred a few times in metazoans, green plants, brown and red algae, and fungus. Opisthokonta, Archaeplastida, and Stramenopila are the superkingdoms with creatures that display complex multicellularity. Opisthokonts are eukaryotic groupings that comprise amoebae, fungi, and mammals. The photoautotrophic red algae, green algae, land plants, and the small group glaucophytes comprise the Archaeplastida, a large group of eukaryotes. Stramenopiles are eukaryotes categorized as protists because they are not fungi, animals, or plants.
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Mucus is moved along the lining of the trachea by extensions from cell membranes known as:_________
The cilia, which are projections from cell membranes, are responsible for moving mucus along the lining of the trachea.
You will find cilia, which are tiny, hair-like structures, in the inner layer of the trachea. Cilia move rhythmically to remove mucus from your trachea so you may either ingest it or expel it. You have a muscle called the trachealis between every ring of cartilage in your trachea. On the outside of airway cells, cilia are movable, tiny projections that resemble fingers. The cilia that line the airways aid in raising and expelling mucus from the lungs. breathing epithelium. Mucus is secreted by the goblet cells, covering the tips of the ciliated cells in a protective layer. The cilia's regular, coordinated beating sweeps any debris attached to the mucus up and out of the airways.
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How does the bottleneck effect undermine the effort of conservation biologists who are trying to save species nearing extinction?.
Bottleneck effect helps the biologists to save species nearing extinction because it helps in reestablishment of the species.
Specified, widespread violence or purposeful culling, human population planning, and other human actions such as famine, earthquakes, floods, fires, disease, and droughts can all cause population bottlenecks. Population bottlenecks can also occur owing to genetic bottlenecks. Such occurrences can lessen the genetic variety of a community, leaving just a smaller population to transmit genes to future generations of offspring through sexual reproduction.
from such a small population by continuously breeding and providing good environment the again flourishment of the species can take place.
Thus, this small population is now taken care of by biologist so that the proper sexual reproduction can take place and thus the population is maintained and thus conservation takes place.
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Metastasis is enabled by __________. the nervous system the lymphatic system the circulatory system both the lymphatic and circulatory
Answer:
Epithelial-Mesenchymal Transition, Anoikis and Loss of Adhesion
Explanation:
The spread of cancer cells from the place where they first formed to another part of the body. In metastasis, cancer cells break away from the original (primary) tumor, travel through the blood or lymph system, and form a new tumor in other organs or tissues of the body.
6. What is the density of a cube of water measuring 2cmX4cmX1cm, with a mass of
8g?
Plsss helpppp fasttt
Answer:
1 g/cm³
Explanation:
To find density we need to know the mass and the volume. We already know that the mass is 8 g. Now we need to know the volume using the dimensions above, so all we need to do is
2cmX4cmX1cm to give us 8cm³
Now that we know both the mass and the volume all we have to is to divide the mass(8g) by the volume(8cm³) to give us 1g/cm³(which btw is almost always the constant density of water)
What is the position of the body when it is in the ""normal anatomical position?"".
When a person is standing straight, facing forward, with both arms hanging loosely at their sides and their palms facing forward, this is known as being in anatomical position or the standard anatomical position. With their feet flat on the ground and facing forward, the legs are parallel.
When the body is in anatomical position, where is it?A person in the standard anatomical position is one who is standing, facing forward, with their feet together and their toes pointing in the same direction. From the observer's point of view, none of the long bones are crossed.
The anatomical position is significant because the body is described by anatomic terms when it is in that position, including anterior and posterior, medial and lateral, superior and inferior, and so on.
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Coral bleaching results from a loss of the dinoflagellate endosymbiote. What is the metabolic result on the coral from coral bleaching?.
Coral bleaching results from a loss of the dinoflagellate endosymbiont. The metabolic result on the coral from coral bleaching is the byproducts of photosynthesis are unable to provide the coral with energy.
The metabolic results on coral are many which are from coral bleaching when corals become white as a result of numerous stressors, such as variations in temperature, light, or nutrition, the process is known as coral bleaching. The algae (zooxanthellae) that dwell inside coral polyps are shed during bleaching, turning the coral white as a result.
The photosynthetic zooxanthellae start to create reactive oxygen species as the water temperature rises. The coral expels the zooxanthellae since this is poisonous to it. Coral tissue turns transparent, exposing the coral's calcium carbonate skeleton since the majority of the coral pigmentation is produced by zooxanthellae.
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Muscle cells generate atp by burning fuel (glucose) and oxygen in a process called _____ respiration.
a. isometric
b. isotonic
c. anaerobic
d. aerobic
Muscle cells generate atp by burning fuel (glucose) and oxygen in a process called aerobic respiration.
Aerobic respiration is the process by which organisms convert fuel, such as fats and sugars, into chemical energy by using oxygen.
During aerobic cellular respiration, glucose reacts with oxygen to form ATP, which the cell can use. As a byproduct, carbon dioxide and water are produced.
The overall equation for aerobic cellular respiration is:
C₆H₁₂O₆ + 6O₂ --------------------> 6CO₂ + 6H₂O + ATP
Cellular respiration
All cells use respiration to convert fuel into energy that can be used to power cellular processes. Adenosine triphosphate (ATP) is the end product of respiration, and it uses the energy stored in its phosphate bonds to power chemical reactions. It is frequently referred to as the cell's "currency."
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A nurse is explaining to another nurse the difference between first-generation antipsychotics and second-generation antipsychotics. what is the biggest benefit of the second-generation antipsychotics?
A nurse is explaining to another nurse the difference between first-generation antipsychotics and second-generation antipsychotics. what is the biggest benefit of the second-generation antipsychotics?
First generation antipsyhotics are the conventional antipsyhotics which blocks the dopamine pathway by blocking the D2 receptors and reduces the dopaminergic neuro-transmission.
Second generation antipsyhotics also called atypical antipsychotics which partial block dopamine receptors and also affect other things like serotonin.
Second generation antipsyhotics are more effective in reducing the symptoms schizophrenia and also improves the overall quality of life. They also have a lower risk of neurological symptoms like tremors, like the first generation drugs.
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A homeostatic imbalance that activates these bone cells would lead to a loss of bone density.
Answer:???
Explanation:
The term that means cancer in the early stage, before invading the surrounding tissue is:_______
According to the research, the correct option is Carcinoma in situ. The term that means cancer in the early stage, before invading the surrounding tissue is: Carcinoma in situ.
What is a carcinoma?It is a malignant neoplasm made up of anaplastic epithelial cells with metastatic capacity, being the early stage of cancer follow-up that should have a diagnosis of recurrence.
In this sense, in situ means that it is a cancer that has not metastasized to other parts of the body and, therefore, has not invaded nearby tissues.
Therefore, we can conclude that according to the research, the correct option is Carcinoma in situ. The term that means cancer in the early stage, before invading the surrounding tissue is: Carcinoma in situ.
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Amoeba sisters video recap traveling molecules
Answer: The answer is facilitated diffusion, simple diffusion , facilitated diffusion , active transport and simple diffusion.
Explanation: Facilitated diffusion is the process of passive transport in which the ions or the molecules moce or trasported across the biological membrane via transmembrane integral protein or protein channels and they do not need the ATP as energy whereas in simple diffusion the movement of ions and the molecules takes place but without the help of any kind of proteins and it happens through the semi permeable membrane and lastly the active transport is the movement of ions and molecules against the concerntration gradient and requires energy by hydrolysis of ATP and uses it .
In first case the aquaporins are used which are transport channels or helper proteins so it a passive transport but facilitated by proteins so is facilitated diffusion.
In second case it is simple diffusion because due to the smaller size of water molecules the they move and doesn't require any kind of help while doing so.
In third case as the movement is down the gradient and the molecules are charged so is an example of facilitated diffusion.
In the fourth case as the inward movement of glucose is needed and to move from inside the cell to outside the cell it is against the concerntration gradient so it will require the ATP hence is active transport.
In the fifth case as glucose is already in high amount so can easily diffuse inside the cell hence is simple diffussion.
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Many critical nutrients in our food come in the form of biological macromolecules. what are macromolecules?
The four main biological macromolecules are lipids, proteins, nucleic acids, and carbohydrates. The term "macronutrient" particularly refers to the macromolecules that give the organism its nutritional energy.
What are biological macromolecules?Large, naturally occurring cellular components known as biological macromolecules perform a variety of vital tasks for the development and survival of living things. There are four significant categories of biological macromolecules: lipids, proteins, nucleic acids, and carbohydrates.
Proteins, nucleic acids, and polysaccharides are typical examples of macromolecules.
Macromolecules are enormous molecules that fill a cell and give it vital life-sustaining activities. Macromolecules, for instance, offer structural support, serve as a reservoir for stored energy, have the capacity to store and retrieve genetic information, and can speed up biological operations.
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Which hormone elevations indicate turner syndrome? select all that apply. one, some, or all responses may be correct.
Lutropin and Follitropin hormone elevations indicate turner syndrome.
The nurse monitors the client for which side effect of the atropine sulfate in the postoperative period?The answer is Urinary retention.
Urinary retention is a disorder where your bladder is unable to completely empty of urine. Chronic urinary retention prevents the bladder from emptying entirely over time as opposed to acute urinary retention, which causes an abrupt inability to urinate.
Individuals with intense urinary maintenance can't urinate by any means, despite the fact that they have a full bladder. Intense urinary maintenance, a possibly hazardous medicinal condition, requires quick crisis treatment. Intense urinary maintenance can cause awesome distress or torment.
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Dan is using a metal rod to sharpen his most favorite knife. to start this process, he should hold the steel rod in what direction with the tip firmly
pressed against the counter?
o a rotating between horizontal and vertical
ob. diagonally
oc. vertically
od. horizontally
Dan is using a metal rod to sharpen his favorite knife. to start this process, he should hold the steel rod in a diagonal direction with the tip firmly pressed against the counter.
Hold the blade at a 15-degree angle far away from the steel. Maintaining a light, consistent pressure, and 15-degree angle between the blade and honing steel, slide the blade down the length of steel during a sweeping motion, pulling the knife toward your body in order that the entire edge of the blade makes contact with the steel. 3. Repeat this motion on another side of the blade.
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Two or more atoms make up a(n) ____________ and are exemplified by groups of macromolecules known as carbohydrates, proteins, lipids, and nucleic acids..
The correct answer for this question is Molecule.
Proteins, carbohydrates, nucleic acids, and lipids are the four primary types of biological macromolecules, which are huge molecules required for life that are composed of smaller organic molecules. Macromolecules are made up of monomers, which are single units bonded together by covalent bonds to create bigger polymers.
A macromolecule, such as a protein or nucleic acid, is a very big molecule crucial to biophysical processes. It is made up of many atoms that are covalently bound. The smaller molecules known as monomers are the building blocks of many macromolecules. Large non-polymeric molecules like lipids, nanogels, and macrocycles, as well as biopolymers (proteins, carbohydrates, and nucleic acids), are the most prevalent macromolecules in biochemistry. In addition to synthetic fibers, macromolecules can also be found in research materials like carbon nanotubes.
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In your own words what is Adhesion water property
Answer:
Adhesion of Water Molecules. The adhesion property is also often observed in water. This is because the adhesion of water allows it to "stick" to many surfaces and objects. The adhesion of water is best explained as the ability of water to stick to other surfaces through the creation of weak surface bonds
Explanation:
The binding of a signal molecule called a(n) ____________ alters the shape of the active site such that it cannot bind the substrate
activator
The binding of a signal molecule called a activator , alters the shape of the active site such that it cannot bind the substrate.
What triggers cellular Signaling?Typically, different signaling molecules deliver chemical signals to cells. A chain of events is started when a signaling molecule binds to the right receptor on a cell surface, which not only sends the signal inside the cell but also amplifies it.What three categories do signaling molecules fall under?Hormones, neurotransmitters, regional transmitters, and pheromones are the four primary categories of signaling molecules. Each one performs a different job in the body and has a different spectrum of activity.What is a signal-producing molecule?As a broad term for molecules that particularly attach to other molecules, "ligand" is frequently used to refer to signaling molecules (such as receptors). The message sent by a ligand is frequently transmitted inside the cell through a series of chemical messengers.To learn more about cell signaling visit:
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2. (a) Identify the range diagram above in which most of the species population is found. Explain why this is the case:
________________________________________________
(b). Describe the greatest constraints on an organism's growth and reproduction within this range: ________________________________________
a) Most individuals are found within the optimum range, which is where there is a higher degree of preferred niche. b) constraints are competition for resources and female access, and preferred niche running out faster.
What is the tolerance range?
The tolerance range refers to the limits between which a species can live and reproduce. These limits depend on environmental factors, which might be biotic or abiotic.
The environmental factors that influence a species' survival are the limiting factors. These are, for instance,
temperature, pH, radiation, salinityIn an environment, and concerning a particular species, we can identify three different zones or ranges,
Optimum ⇒ this range has the best conditions for individuals' survival and reproduction. The largest populations live withing this range.Physiological stress ⇒ this area does not have the best conditions. Only a few individuals can survive here, and populations are small. Intolerance ⇒ In this area there are bad conditions for individuals to survive. They can not live in this ranges. No population is found here.In the exposed example, we have the relationship between number of individuals and niche availability. The limiting factor here is niche availability.
2. (a) Identify the range diagram above in which most of the species population is found. Explain why this is the case:
Most individuals are found within the optimum range, which is where there is a higher degree of preferred niche. Preferred niche is where they can hide, feed, and reproduce.
(b). Describe the greatest constraints on an organism's growth and reproduction within this range
As we can see most individuals and the largest populations are inhabiting the same range. What does it mean?
It means
Greater competition for resources and mating events. Individuals will compete for food and shelter. Males will compete for female access.The higher the number of individuals living in the same range, the faster resources will run out. This means that in a relatively short time there will not be available preferred niches for these fishes.
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A colorblind woman and a non-colorblind men are planning to start a family. the expected phenotypic ratio of their children is:_______.
The expected phenotypic ratio of the children for a colorblind woman and a non-colorblind man will be 1:2:1(carrier daughter: normal daughter: normal son: colourblind son)
Color blindness is a sex-linked recessive disease (meaning the gene is almost always found on the X chromosome) which means that it excessively affects only males since they have one X chromosome and females have two, which most of the time is expressed in only one. In this disease, people see different colors as compared to normal people. The person can not be able to judge the brightness of the color and different shades of a color.
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Prompt
Use the model here to describe the transfer of matter and flow of energy from one trophic level to another within an ecosystem. All of
the following must be addressed in your response to receive full credit:
a
Discuss the transfer of biomass when one organism eats another. Use your knowledge of digestion to discuss how food is broken
down and used by the consumer.
b. Explain what happens to the energy that is not transferred from one organism to another.
c. Explain why there are typically fewer organisms at of the top of an energy pyramid.
d. Use specific numbers and calculations to support your explanation.
<< Read Less
The energy contained within the trophic levels of an environment is represented graphically by an energy pyramid, sometimes referred to as a trophic or biological pyramid.
The producers are located at the base of the pyramid, which is also its largest level. This level also contains the most energy. An ecological pyramid, a food web, or a level in a food chain are all examples of trophic levels. It is inhabited by a collection of creatures with comparable eating strategies. Energies are lost as metabolic heat when an organism from one trophic level is consumed by an organism from the next level, which causes energy to diminish as it goes up the trophic levels. The efficiency of energy transfer between trophic levels is measured by a term called trophic level transfer efficiency (TLTE).
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The ____________ signals mesoderm surrounding it to develop into muscle and connective tissue.
spinal cord enable the body to have stamina to be able to do task
Explanation:
spinal cord enable the body to have stamina to be able to do task
During which period of development is the unborn baby most at risk of developing a structural defect due to the effects of a teratogen, such as zika virus or lead?
During stage of development, an unborn child is most at risk of experiencing a structural defect as a result of exposure to a teratogen like the zika virus or lead
: embryonic period
What is the development of an embryo?
The first eight weeks of human embryonic development are referred to as embryonic development; from the start of the ninth week, the embryo is referred to as a fetus. The study of this growth in the first eight weeks following fertilization is known as human embryology. The average gestation (pregnancy) lasts 40 weeks, or nearly nine months.
Teratogens are substances or conditions that can lead to an embryo's deformity; these include alcohol, tobacco smoke, narcotics, maternal stress, and the age of the father. Due to the impact of teratogens, the unborn child is at a very high risk of acquiring structural problems during the embryonic stage. Teratogens can cause aberrant bone, muscle, and tendon growth.
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What do gymnosperms and angiosperms have in common?
a. seeds
b. flowers
c. spores
d. none of the other answer options are correct
in a short essay (100–150 words), discuss darwin’s view of how natural selection resulted in both unity and diversity of life on earth.
Natural selection is the mechanism in which an individual is naturally selected for adaptation or for the survival according to the resources availability that explains about the diversity of life.
It also explains that the new species come from pre-existing species and all the species shares a common ancestor that explains about the unity of life.
Darwin's theory on Natural Selection was proposed for the evolution. There are five basic steps, on which natural selection was base Variation, Inheritance, Selection, Time & adaptation
Without the knowledge of natural selection, it is impossible to understand the concept of unity and diversity of life on earth.
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A long narrow fault at the base of the groove on the enamel surface of a tooth is called?
A long narrow fault at the base of the groove on the enamel surface of a tooth is called a fissure. A fissure is a significant crack in a tooth's surface that often happens as a result of inadequate enamel adhesion between the surrounding dental lobes. It can have a dental sealant placed on it to reduce the possibility of cavities.
Standard microsampling methods make it difficult to assess the fluoride (F) distribution in the enamel bordering the occlusal fissures of human molars and premolars, despite the fact that these areas are particularly vulnerable to caries.
The varied outer layer qualities in sound fissure enamel are more likely the result of developmental processes than environmental causes.
Enamel is the word for the hard outer layer that covers teeth. As teeth erupt, a condition known as enamel hypoplasia manifests. The underlying causes might be environmental or hereditary.
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_____ 1. Centrosome A. destroys viruses
_____ 2. Cytoskeleton B. makes proteins
_____ 3. Plasma membrane C. organizes the cytoskeleton
_____ 4. ATP D. protects DNA from viruses
_____ 5. Glucose E. surrounds the cells
_____ 6. Mitochondria F. gives cell its shape
_____ 7. Nucleus G. fixes holes in the nucleus
_____ 8. Nucleic acids H. adenosine triphosphate, energy molecule
_____ 9. RNA I. vesicles that absorb free radicals
_____10. Amino acids J. simple sugar that can be used to make ATP
_____11. Ribosomes K. cell’s power plant, 1 glucose = 38 ATP
_____12. Viruses L. protein filled “bubble”
_____13. Slicer enzymes M. cell’s command center, stores DNA
_____14. Fatty acids N. the stretchy outside of a cell, regulates in/out
_____15. Membrane O. makes complex proteins, factories
_____16. Endoplasmic reticulum P. has a protein coat and viral DNA/RNA
_____17. Vesicle Q. blueprint for proteins
_____18. Free radicals R. template for RNA
_____19. DNA repair enzymes S. sorts and processes vesicles
_____20. Peroxisomes T. makes up membranes
_____21. Golgi body U. for photosynthesis, in plants
_____22. Chloroplasts V. Where the membrane is produced
_____23. Defensin W. damages the cell, produced along with ATP
Answer There are many cell organelles in the body performing different functions to regulate the whole body.
Explanation: Centrosome is mainly used for the regulation of the motility of cells and also in the facilitation of the spindle poles during mitosis.
The cytoskeleton is used to maintain the shape and its internal organization and also provides mechanical support.
The plasma membrane function is the regulation of the transportation of materials in intercellular and extracellular cells.
ATP is adenosine triphosphate which is also known as the energy house of the cell and provides energy for the functioning of many cellular processes.
Glucose is the main source of energy in the body and is found in blood also known as blood sugar.
Mitochondria are called as powerhouse of the cell and generate or form the ATP by using the F1 F0 channel.
The nucleus is the brain of the cell as all works are done by the nucleus and it contains the DNA which is also the genetic material in the human body.
Nucleic acids are the genetic materials that are DNA and RNA as deoxyribonucleic acid and ribonucleic acids and are found in bacteria, viruses, humans, animals, and plants and are also hereditary material.
RNA is ribonucleic acid that can be single-stranded or double-stranded and is mostly found in plants and is the hereditary material.
Amino acids are the building blocks of proteins and monomeric units of the same.
Ribosomes are used to make proteins.
Viruses are pathogens that damage the cell and the body slowly using the machinery of the host cell and replicating its own DNA.
Slicer enzymes are used to cleave the RNA and have the activity of the endonuclease enzyme.
Fatty acids are lipids that help in the metabolism of the body.
The membrane helps in the protection of cells and transportation.
The endoplasmic reticulum helps in the formation of lipids
Vesicles are used to transport materials and recycle waste materials.
Free radicles react with other molecules and are reactive oxygen species having uneven numbers of electrons and giving large chain oxidation reactions.
DNA repair enzyme makes up the cleavage and helps to recover the damage.
Peroxisomes sequester diverse oxidative reactions and involve in metabolism.
The Golgi body is a factory in which proteins received from the endoplasmic reticulum are further processed for transportation to other destinations.
The chloroplast's function is to do photosynthesis.
Defensin molecules protect from damage and pathogen.
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Please explain so I can learn how to do questions like this.
Voluntary green power purchases began through a variety of state and utility programs. Between 1999 and 2004, more than 500 utilities in 34 states began to offer their retail customers the option to buy green power. Mandates that required utilities to offer green power products were enacted in 5 states between 2001 and 2003. All but one statement describes a benefit of green power.
A Green power supports the use of renewable energy resources.
B Green power is a cheaper energy resource for the general population.
C Green power reduces greenhouse gas emissions and other pollutants.
D Green power fosters an improved living and community enviorment.
it is A
The green power supported the resources
When a non-enveloped animal virus adsorbs to the host cell with its protein spikes, the virions are taken into the cell by the process of:_______
When a non-enveloped animal virus adsorbs to the host cell with its protein spikes, the virions are taken into the cell by the process of endocytosis
What is endocytosis?Substances are introduced into the cell during endocytosis, a cellular process. A portion of the cell membrane that surrounds the substance to be internalised splits off to form a vesicle that holds the substance once it has been ingested. Phosphocytosis and pinocytosis are two examples of endocytosis.
By engulfing substances from the outside in a vesicle, cells can take them in through the process of endocytosis. Pathogens that immune cells engulf and eradicate can be one of these, as can nutrients that support the cell.
The movement of glucagon from the pancreas into the liver, where it is further processed for simpler absorption into the blood stream, is an example of exocytosis. delivery of protein-filled vesicles by T cells to virally infected cells.
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An estimate of the proportion of trait variability in a population that is determined by variations in genetic inheritance is termed?
Heritability ratio
An estimate of the proportion of trait variability in a population that is determined by variations in genetic inheritance is termed as heritability ratio.
What is variations in genetic inheritance?Variants that are inherited (or hereditary) are present in almost all of a person's cells throughout their lifetime and are passed from parent to kid. Because the parent's egg or sperm cells, which are also known as germ cells, contain these variants, they are also referred to as germline variants.What is heritability ratio?Heritability, which varies from 0 to 1, is the proportion of genetic variance to phenotypic variance. High heritability levels of 0.5 indicate that, on average, half of the variations in animal characteristics are inherited. Low values of around 0.1 indicate that the majority of the variations are not genetic.The significance of a high heritability ratio:Heritability quantifies a trait's genetic influence. If the heritability is high, close to 1, it means that most of the variation in a variable among individuals can be attributed to genetics; if the heritability is low, close to 0, it means that most of the variation is not genetic.To learn more about heritability ratio visit:
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