The difference between a cell in g1 phase and a cell in g2 phase of the cell cycle is:
The first phase of the cell cycle's interphase, known as the G1 phase, is when cells begin to expand by synthesizing proteins and other substances. The G2 phase is the third interphase of the cell cycle, during which the cell makes the required proteins and other components to prepare for nuclear division.What does G1 do for cells?Between the conclusion of cell division during mitosis and the start of DNA replication during S phase, there is an intermediary phase called G1. The cell develops during this period to prepare for DNA replication, and some internal elements, such the centrosomes, go through replication.What is the G2 phase of a cell?The cell grows more, produces proteins and organelles, and starts to remodel its internal structure in preparation for mitosis during the second gap phase, also known as the end subscript phase.To learn more about cell phases visit:
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A multicellular, photosynthetic, eukaryote that is typically adapted to life on land is a(n):________
A multicellular, photosynthetic, eukaryote that is typically adapted to life on land is a green plant.
What are plants?Plants are organisms that is not an animal, especially an organism capable of photosynthesis.
They are multicellular eukaryotes that includes chloroplasts in their cells, and have a cell wall.
Plants are regarded to be autotrophic in nutrition because they can synthesize their own food through the process of photosynthesis that takes place in their chloroplasts.
This suggests that a multicellular, photosynthetic, eukaryote that is typically adapted to life on land is a green plant.
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Every chromosome contains numerous genes, and each cell contains approximately _____ genes.
a) 20,000
b) 10,000
c) 50,000
d) 70,000
Every chromosome contains numerous genes, and each cell contains approximately 20,000 genes.
Chromosome consist of long strands of DNA which forms the genetic material of the organisms. The DNA is interwinded with the help of histone and non histone protein to form the chromosome. Human cell have 23 pairs of chromosomes
Chromosomes is most prominent during the metaphase stage of cell division.
It contains all the genetic material that is needed to be transferred to the daughter cell.
Genes are segments of DNA that are present in the chromosomes and code for a particular protein that is having one or more function in the body. They form a part of the chromosome. We have around 20,000 genes.
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At a chemical synapse, the release of neurotransmitter occurs in response to a graded depolarization of the synaptic terminal. True or false?.
Answer:
True: Neurotransmitters are released at chemical synapses in reaction to a gradual depolarization of a synaptic terminal.
The basic building block of the neurological system is indeed the neuron. A junction known as a synapses connects neurons in the neurological system. Neurotransmitters, which are released into synapses by neurons, are used for communication.
A stimulus that causes this nerve's resting membrane potential activates a presynaptic neuron. An action potential is then carried by the presynaptic nerve. The chemicals called neurotransmitters are being secreted into synapses together with action potential after passing via synaptic terminals.
Synaptic terminals get depolarized as a response of action potentials travelling thru the axon at those terminals. Depolarization causes the synaptic ion channels to open. In light of this, we may state that within a chemical synapse, neurotransmitters are released in response to a gradual depolarization of the synaptic terminal.
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Infancy is a sensitive period in terms of brain development especially due to _____________________
Infancy is a sensitive period in terms of brain development especially due to its ability to adapt and learn from experiences.
Sensitive periods are the period in which an individual is more sensitive to various experiences and environments. He learns from his experiences and makes himself adapt to the environment. It occurs during prenatal and postnatal periods when development generally occurs slower. For example, a child learns his native language slowly while living in an environment and learns more experiences.
Sensitive periods in terms of brain development are when synapses and their neural routes are created earlier than other times. The formation of synapses and neural pathways is termed synaptogenesis. During this period, the brain prepares itself to learn from experiences and adapt itself to the environment.
An infant when exposed to a certain type of environment would develop his skills and intelligence accordingly. This is why it is often referred to as the sensitive period of development.
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Lu is from korea and pedro is from ecuador. lu and pedro share what percentage of their genes?
Lu and Pedro share 99.7 percentage of their genes,
Gene- The fundamental structural and operational component of heredity is a gene. DNA is the component of genes. Some genes serve as blueprints for the synthesis of proteins. Many genes do not, however, code for proteins. A few hundred DNA bases to more than 2 million bases make up a gene in a person.
Heredity- The whole of biological mechanisms via which certain traits are passed down from one generation to the next.
DNA- The molecule found inside cells that carries the genetic material necessary for an organism to grow and operate. This knowledge may be handed on from one generation to the next thanks to DNA molecules.
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A bag contains 6 clear marbles and 4 red marbles one marble is drawn from the bag and replaced a second marble is drawn from the bag and replaced what is the probability of getting a clear marble the first time and a red marble the second time
Answer:
4/25
Explanation:
bag contains 6 clear marbles and 4 red marbles = 6+4=10
chance of red marble = 4/10
4/10=2/5
Now, probability of getting a red marble the first time AND a red marble the second time = (2/5) x (2/5)=4/25
The grouping that includes turtles, lizards and snakes, crocodiles and alligators, birds, and bats is: _____.
A. polyphyletic.
B. monophyletic.
C. paraphyletic.
Option(B) monophyletic is the right answer.
The grouping that includes turtles, lizards and snakes, crocodiles and alligators, birds, and bats is monophyletic.
What is monophyletic?A monophyletic taxon is a collection of organisms that includes both the most recent common ancestor of all the creatures in the group as well as all of their offspring. Another name for a monophyletic taxon is a clade. Angiosperms, mammals, birds, insects, etc. are few examples.How are monophyletic groups recognized?A group of species that is monophyletic comprises all of its progeny as well as the common ancestor they all share. A monophyletic group on a phylogenetic tree consists of a node and all of its offspring, represented by both nodes and terminal taxa.What distinguishes a group from a paraphyletic group or a polyphyletic group?Monophyletic: All of the ancestor's offspring are included in the monophyletic group. Paraphyletic: The paraphyletic group does not include all of the ancestor's offspring. Polyphyletic: The members of a polyphyletic group do not all descend from the same ancestor. Monophyletic A common ancestor exists in monophyletic groups.To learn more about monophyletic group visit:
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The fine adjustment knob on the microscope? locates the focus plane. fine-tunes the focus. all of the answer choices are correct. locates the specimen.
The fine adjustment knob on the microscope fine-tunes the focus.
What is a microscope?The human eye cannot see objects so small, thus a microscope is employed in laboratories to examine them.Microscopy is the study of small things and their structures under a microscope. Things that are microscopic are those that are difficult to perceive without a microscope.A technique to explain how a microscope interacts with a sample and produces images is to deliver an electron or light beam through the sample along its optical path, detect photon emissions from the sample, or use a probe to scan over and a short distance from the sample's surface. There are many different types of microscopes, and they can be categorized in a variety of ways.To learn more about the microscope, refer to the following link:
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What major cities are located near the San Andreas Fault?
Hey! Here is the pictures of the cities that are near the fault!
CCC Cause and Effect What would happen to the probabilities of yellow and green seeds if one parent were homozygous recessive and the other were homozygous dominant?
Answer:
He proved that an organism inherits alleles ("factors") that control which traits are expressed and that these alleles could be dominant or recessive.
How often should neurologic assessments and vital signs be taken initially for the patient receiving tissue plasminogen activator (tpa)?
Neurologic assessments and vital signs need to be taken initially for the patient receiving tissue plasminogen activator (TPA) each regular 15 min (15 minutes).
What is the tissue plasminogen activator (TPA)?The tissue plasminogen activator (TPA) is a factor used or to trigger the natural process of breakdown of blood clots during coagulation, which may be very useful to restore the normal blood flow to the brain after a stroke.
In conclusion, neurologic assessments and vital signs need to be taken initially for the patient receiving tissue plasminogen activator (TPA) each regular 15 min (15 minutes).
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In studies of disease-discordant monozygotic twin pairs, one searches each pair for __________________, focusing on those areas of dna that are thought to be involved in the disorder
In studies of disease-discordant monozygotic twin pairs, one searches each pair for epigenetic differences.
What is DNA?The DNA is the genetic material that is found in human beings. The DNA of a person contains the information that could be passed on from parents to the offspring and this is the basis of inheritance.
In studies of disease-discordant monozygotic twin pairs, one searches each pair for epigenetic differences , focusing on those areas of DNA that are thought to be involved in the disorder.
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list precautions used in the science laboratory to minimize the following risks
a) poisoning
b) scalding
c) eye damage
Answer:
Avoid skin and eye contact with all chemicals.
Minimize all chemical exposures.
Know locations of laboratory safety showers, eyewash stations, and fire extinguishers.
Assume that all chemicals of unknown toxicity are highly toxic.
Explanation:
What possible uses do computerized devices have in optometry?
Coputerized devices are used to detect glaucoma, precise the cataract procedure and check for retinal tears.
What are the tools used by optometrists?Regular people may find the tools used by optometrists daunting, which is why many avoid or persistently put off getting their yearly eye exams. However, these tools are quick, effective, and incredibly accurate at determining the condition of the eye.
The common instruments used by ophthalmologists and optometrists to perform eye exams are listed below.
TonometerPhoropterRetinoscopeAutorefractorSnellen ChartRetinal CameraOphthalmoscopeVT 1 Vision ScreenerLearn more about the optometry with the help of the given link:
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A thin layer of tissue called the _____ covers the brain's two hemispheres, collectively known as the _____.
A thin layer of tissue called the cerebral cortex covers the brain's two hemispheres, collectively known as the cerebrum.
What is the cerebral cortex?The cerebral cortex is a layer of the cerebrum that covers both the right brain hemisphere and the left brain hemisphere associated with the highest skills as motor functions.
In conclusion, a thin layer of tissue called the cerebral cortex covers the brain's two hemispheres, collectively known as the cerebrum.
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The pad of fatty tissue that covers the area of the pubic bone is called the ________.
The pad of fatty tissue that covers the area of the pubic bone is called the mons pubis
The pubic bone is protected by a fatty cushion called the mons pubis. The mons, or mons veneris in females, is another name for it. Although both have a mons pubis, females tend to have it more pronounced.
Females tend to have a large mound of tissue that is typically covered in pubic hair. During sexual contact, the mons pubis serves as a source of cushioning. Sebaceous glands that release pheromones to promote physical attraction are also found in the mons pubis.
The mons pubis is a part of the vulva. This is the rounded region in the bottom portion of the belly that is in front of the pubic bones (abdomen). At puberty, it grows hair all over it. The vulva has two skin folds.
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In what order does initiation of dna replication proceed (from 1 = first to 4 = last)?
The correct order of DNA replication is: (2) DNA unwinds at the origin of replication; (4) Helicase opens up replication forks, which extend in both direction; (3) Primase synthesizes RNA primers; and (1) DNA polymerase adds nucleotides.
DNA replication is the process where the copies of DNA are formed. The process occurs inside the nucleus of the cell in eukaryotes. The replication occurs in 5' to 3; direction. One leading and one lagging strands are formed.
DNA Polymerase is the main enzyme involved in DNA replication. There are three types of DNA polymerase in prokaryotes while in eukaryotes there are 5 types.
The question is incomplete. The complete question is:
In what order does initiation of DNA replication proceed (from 1 = first to 4 = last)?
(1) DNA polymerase adds nucleotides.
(2) DNA unwinds at the origin of replication.
(3) Primase synthesizes RNA primers.
(4) Helicase opens up replication forks, which extend in both direction.
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PLEASE HELP
The rate of photosynthesis can be measured as the volume of oxygen released by a
plant per minute. The number of bubbles of gas released per minute from waterweed is
counted.
a. The gas collected in this experiment is not pure oxygen. Suggest a reason for this.
b. The graphs below show the effect of light intensity on the rate of photosynthesis at
different carbon dioxide concentrations. Explain what the graphs show.
In the given experiment to measure the rate of photosynthesis;
the gas collected is a mixture of oxygen and water vapor.the graph shows that the rate of photosynthesis increases with increase in light intensity.What is photosynthesis?Photosynthesis is the process by which plant use the energy of sunlight to produce sugars from carbon dioxide and water vapor.
Photosynthesis occurs in the chloroplasts which are membrane-bound organelles found in the leaves of plants,
The green pigment chlorophyll, found within the chloroplasts is the responsible for the reactions of photosynthesis.
The rate of photosynthesis increases with increase in the number of chloroplasts as well as with increase in the amount of sunlight.
Considering the experiment to measure the rate of photosynthesis in an aquatic plant:
The rate of photosynthesis can be measured as the volume of oxygen released by a plant per minute. The number of bubbles of gas released per minute from waterweed is counted.
Oxygen gas as well as water vapor is collected above the test tube. therefore, the gas collected is a mixture of oxygen and water vapor.
The graph shows that the rate of photosynthesis increases with increase in light intensity.
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Which period in human history occurred first in time?
Answer:
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins c. 3.3 million years ago and the beginning of recorded history with the invention of writing systems.
Explanation:
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The law of segregation would predict that the f2 progeny of f1 heterozygous plants will exhibit a ________.
The law of segregation would predict that the f2 progeny of f1 heterozygous plants will exhibit a 3:1 phenotypic ratio and a 1:2:1 genotypic ratio.
The Law of segregation was presented by Mendel to describe the characteristics of specific traits in organisms during gamete development.
According to this law, each gene has a particular allele that serves as a carrier of definite traits.
During the segregation process. the alleles separate and carry the dominant traits that will decide the characteristics of phenotypes of the next generation or offspring. This is also known as 'the law of inheritance.
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What is the arrow pointing to?
hydrogen ion
water
hydroxide ion
proton
hydronium ion
The arrow points to the hydroxide ion.
What is an ion?
An ion is a specie that is formed by the loss or gain of electrons. Thus any specie that carries a charge whether positive or negative could be called an ion. In this case, we have a system that has three ions in it. The hydrogen ions, the hydroxide ions and the hydronium ions.
As we can see, the red color stands for oxygen, the grey color stands for hydrogen. Looking at the image, we can see that the direction in which the arrow point is a specie that has only red and ash colors thus this corresponds to the hydroxide ion.
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Compact bone is characterized by many cylindrical osteons. osteons are formed by layers of nested cylinders each called a(n):____.
Compact bone is characterized by many cylindrical osteons. osteons are formed by layers of nested cylinders each called lamella.
What is compact bone?
The dense, hard outer layer of all bones in the human body is composed of compact bone, sometimes referred to as cortical bone. One of the two forms of bone tissue, compact bone serves largely to strengthen and protect bones. Spongy bone is the other form of bone tissue.
Lamella is the nested cylinders from which osteons are formed and than from this osteons the compact bone is characterized.
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Which is the most common cell type of connective tissue proper?
a. macrophages
b. mast cells
c. dendritic cells
d. fibroblasts
Option (d) fibroblasts is the correct answer.
Fibroblast is the most common cell type of connective tissue proper.
The most prevalent form of connective tissue cells are fibroblasts. Both fibers and an amorphous ground substance are produced by them.What do connective tissue include?Loose connective tissue, also known as areolar tissue, and dense (irregular) connective tissue make up connective tissue proper. Dense regular connective tissue, cartilage, bone, adipose tissue, blood, and hematopoietic tissue are examples of specialized connective tissue types.Why is it referred to as proper connective tissue?The two forms of connective tissue that make up connective tissue proper are loose connective tissue and thick connective tissue. Specialized cells and distinct ground materials make up specialized connective tissues. Function: It gives the tissues mechanical and structural stability.To learn more about proper tissue connective visit:
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Approximately how many kg of quaternary level carnivore biomass can be supported by a field plot containing 1000 kg of plant material?
Approximately 0.1 kg of quaternary level carnivore biomass can be supported by a field plot containing 1000 kg of plant material.
What is a Carnivore?A Carnivore may be defined as a type of animal that significantly depends or feed primarily or exclusively on an animal matter like flesh or meat. Such types of animals are lions, tigers, etc.
According to Lindemann's 10% law, only 10% of energy is transferred from one trophic level to the other. For example, if a field plot contains 1000 kg of plant material, the primary consumer occupies 100 kg of biomass, secondary consumers occupy 10 kg of biomass, tertiary consumers occupy 1 kg of biomass, and quaternary consumers occupy 0.1 kg of biomass.
Therefore, approximately 0.1 kg of quaternary level carnivore biomass can be supported by a field plot containing 1000 kg of plant material.
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Which of the following properties of water is not a result of hydrogen bonding?
a. lower density of ice compared to liquid water
b. ratio of hydrogen to oxygen in water molecules
c. ability to dissolve many substances
d. cohesion
All living things are based on a
universal genetic code. What is this
genetic code called?
A. a cell
B. molecules
C. DNA
Answer:
C. DNA
Explanation:
Deoxyribonucleic Acid, may look like a curly string
Some organisms in the phylum mollusca can communicate through pigmented cells, called ____________________.
Some organisms in the Phylum Mollusca can communicate through pigmented cells called chromatophores.
Chromatophores are pigment containing cells that produce colour. Chromatophores can be found in a wide range of animals including reptiles, fish, cephalopods and amphibians. Cephalopods, under the phylum Mollusca often use their chromatophores for communication and as a type of camouflage.
Based on their colour under white light, chromatophores can be grouped into; erythrophores (red), xanthophores (yellow), leucophores (white) and cyanophores (blue).
The octopus and other members of the phylum Mollusca change their colours through complex chromatophore organs controlled by muscles.
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For the polymerization of amino acids to form a protein, one would expect the entropy change in the reaction to be negative . this entropy change is expected because _________ .
For the polymerization of amino acids to form a protein, one would expect the entropy change in the reaction to be negative . this entropy change is expected because small monomers are joining to form polymer which decreases the degree of freedom.
Negative entropy change occurs when non-spontaneous change occur in the system. It means something which is more disordered will become less disordered hence energy will be required for the process.
As the monomers of the amino acids binds together to form a long polypeptide chain. It will lead to decrease in the degree of freedom of the amino acids molecule. Hence it can be called as negative entropy change.
Whenever monomers are joined together to form a macromolecule it will be show a negative entropy change.
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The growing area of genetics and gene therapy may allow psychologists to focus on ______ of psychological disorders rather than on ______ only.
The growing area of genetics and gene therapy may allow psychologists to focus on prevention of psychological disorders rather than on treatment only.
What is gene therapy?Utilizing a gene or genes to treat, prevent, or cure a disease or medical condition is known as gene therapy. Gene therapy frequently involves replacing a damaged gene in a patient's cells with a healthy copy of that gene or inserting new copies of a damaged gene. Ex vivo, in vivo, and in situ gene therapy are the three main subtypes. Ex vivo gene therapy involves removing the patient's affected cells and modifying them genetically, either by introducing the therapeutic gene or through other means, to rectify the disease's phenotype. Gene therapy aims to address genetically based disorders (the source).Learn more about the Gene therapy with the help of the given link:
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Some neurons release neurotransmitter which affects neighboring cells, as well as themselves. this is an example of what type of signaling?
This is an example of paracrine signaling.
What are neurotransmitters?A neurotransmitter is a chemical messenger that carries and transfers the signal between neurons. Some examples of neurotransmitters are dopamine, serotonin, and epinephrine.
The process in which one cell responds to the other cell or outside the cell is called cell signaling. There are three types of cell signaling:
Autocrine signalingParacrine signalingEndocrine signalingThe cells which release neurotransmitter and affect neighboring cell is an example of Paracrine signaling.
Endocrine signaling is an example of long distance communication between hormones.
In autocrine signaling the signaling molecules target cell itself.
Therefore, This is an example of paracrine signaling.
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