in biology validity refers to a test measures what it purports to measure.
First, we have to establish the validity of a test score when used for a particular purpose, so that a score may be improperly used for one purpose, but not for anotherSecond, validity is a matter of degree so that we know if validity is sufficient to make use of the test worthwhileThird, we must distinguish between validity n accuracy of norms of a test so that we know if It's possible for a test to have a good validity but have norms that is off the mark. The converse may be also true.Validity is the main extent to which a concept, conclusion or measurement is well-founded and likely corresponds accurately to the real world. The word "legitimate" is derived from the Latin validus, meaning robust. The validity of a size device is the diploma to which the tool measures what it claims to measure.To know more about validity visit :
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_____ are receptor cells contained in the retina and are useful in color perception, particularly in bright-light conditions.
Cones are receptor cells contained in the retina and are useful in color perception, particularly in bright-light conditions.
Retina :The inside of the eye's back is lined by a thin layer of tissue called the retina. It stands close to the optic nerve. The retina's job is to collect light that has been focused by the lens, transform it into neural signals, and deliver those signals to the brain for visual identification.
What is the retina of the eye?Light that enters your eye is converted by the retina into electrical signals that your optic nerve sends to your brain, which produce the images you see. It's a crucial component of your vision. The retina is the layer that is located at the very back of your eye. The retina contains rods and cones, two different types of receptor cells. These cells pick up light energy and absorb it for the nervous system to use.
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A land structure whose main function is to safeguard the coastal wetlands and mainland from ocean waves and storms are?
A land structure whose main function is to safeguard the coastal wetlands and mainland from ocean waves and storms are barrier islands.
Exceptionally flat or lumpy regions of sand that are formed by wave and tide action parallel to the mainland shore are known as barrier islands.
Certain features of barrier islands:-
barrier islands are coastal landforms and a type of dune system. They typically occur in chains made up of anywhere between a few and more than a dozen islands. Although they are susceptible to change during storms and other events, they serve to absorb energy, safeguard coasts, and establish protected water regions where wetlands can grow.To know more about dune system, refer this link.
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How have researchers addressed the limitation you identified in part A of this question? Why is this approach effective?
The evaluation of constraints' effects makes claiming limitations a subjective process. Don't merely identify a study's major flaws and the extent of its limitations.
What is claiming limitations?Doing this would reduce the validity of your research because it would leave the reader wondering whether or how the study's limitations might have affected the findings and conclusions.
You have the chance to show that you have critically considered the research problem, comprehended the pertinent literature published about it.
In addition to gaining new knowledge, one of the main goals of the research process is to challenge preconceptions and investigate areas of unknown knowledge.
Therefore, claiming limitations is identified as a researcher addressed.
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Identify the number of cells that make up organisms.
a) at least 1000 one
b) one or more at least 100
The number of cells that make up organisms are one or more.
What is organism?
Any organic, living system that performs as a distinct individual unit is referred to as an organism in biology. All living things are made up of cells (cell theory). Taxonomy separates species into protists, bacteria, and archaea, which are unicellular microorganisms, or multicellular animals, plants, and fungi. All kinds of creatures are able to reproduce, grow and develop, maintain themselves, and respond to stimuli to some extent. A few examples of multicellular animals that distinguish specialized tissues and organs throughout development are beetles, squids, tetrapods, mushrooms, and vascular plants.
One cell is the bare minimum that living things can possess i.e the minimum number of cells required to form an organism is one.
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Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to ________.
Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to steroid hormones.
What is the thyroid hormone?Thyroid hormone is a peptide hormone secreted by the thyroid gland which serves to maintain metabolic rate and it enters into the cells by diffusion in a similar manner to steroid hormones (it is for that reason thyroid hormone is classified as steroid-like hormone).
In conclusion, thyroid hormone (a small iodinated amine) enters target cells in a manner similar to steroid hormones.
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What happens to the scores in both subjects as we increase the time spent studying biology?
No doubt, when much time is given studying another subject like biology, he will get more scores in biology while the other subject he spent less time on will lower score as this will be at the recieving end.
In order to perform excellently well in one's academics, it is very important to learn how to maintain balance while studying subjects.
Sometimes, students fail a particular subject not because it's difficult but they deprive it of own study attention to another subject because they believe spending time with other subject more will help them not fail it
What is biology?Biology can simply be defined as the study of life or living organisms This goes to say that it helps us to understand all about plants and animals.
A person who studies biology is called a biologist.
Below are some few branches of biology:
ZoologyBotanyMicrobiologyCytologyGeneticsEcologyAnatomyPhysiologySo therefore, no doubt, when much time is given studying another subject like biology, he will get more scores in biology while the other subject he spent less time on will lower score as this will be at the recieving end.
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Any living thing (other than a virus which has no domain) that is not a bacteria or like a bacteria, is grouped into which one of the three domains?
Eukarya is the domain for grouping living thing which is not a bacterium or like a bacterium.
Bacteria, Eukarya, and Archaea are the three domains into which living organisms can be divided. The first two are all prokaryotic bacteria, which are primarily single-celled creatures with an abnormal or loosely connected nucleus. Eukarya includes all forms of life that have a cell nucleus and organelles that are membrane-bound in eukaryotes. These three domains each contain a distinct ribosomal RNA. This serves as the three-domain system's foundation. The Eukarya differ from the Archaea and Bacteria, both of which lack nuclear membranes, but the Archaea and Bacteria are distinguished from one another by specific biochemical and RNA markers. The Archaea is the first and most well-known domain. These are ancient bacterial species that were once categorized as Archaeabacteria and belonged to the kingdom Monera. Therefore, every living entity that is not a bacteria or something that resembles a bacteria is categorized as Eukarya. It can be concluded that both bacteria and Archaea have bacterial backgrounds or have something to do with bacteria, but Eukarya does not.
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What are the five regions of the vertebral column? describe one differentiating feature of the vertebrae in each region.
The five regions of the vertebral column are cervical, thoracic, lumbar, sacral, and coccygeal (or caudal) regions. One differentiating feature of these vertebrae includes their primary functions.
The vertebral column is the central axis of all vertebrates. It protects the spinal cord, provides attachment to the muscle cells, and supports the trunk. It usually consists of 33 vertebrae. The vertebral column in mammals is composed of five different groups of vertebrae:
Cervical region
The primary function is to support the weight of the head. They are numbered C1 to C7. C1 and C2 allow movement of the head.
Thoracic region
The primary function is to hold the rib cage in its place and protect the heart and lungs. They are numbered T1 to T12. They allow limited movement only.
Lumbar region
The primary function is to hold the weight of the body. They have numbered L1 to L5. They allow holding heaving weight.
Sacral region
The main function is to connect the spine to the hip bones (iliac). The five sacral bones are fused and form the pelvic girdle along with the iliac bones.
Coccygeal region
The four coccyx bones provide support to the attachment of ligaments and muscles of the pelvic region.
With the support of the above answer, we can say that there are five regions in a vertebral column, namely, cervical, thoracic, lumbar, sacral, and coccygeal.
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2. During an activity, a teacher labeled the following scenario as hypertonic. Is she correct? Why or why no
%H₂0
15%
solute
80% H₂O
% solute
Correct. The solution in the beaker is hypertonic to the cell interior because its solute concentration is about 20%, which is greater than 15%. Water tends to leave the cell.
What are hypotonic and hypertonic solutions?When placing two solutions together separated by a membrane, we can classify them according to their solute concentration,
A hypertonic solution is the one with the higher solute concentration. It is the most concentrated solution.
A hypotonic solution has lower solute concentrations. It is the most diluted solution.
Isotonic solutions have the same solute concentrations.
In this example, we will assume the circle is a cell,
Cell interior ⇒ 85% water + 15% soluteBeacker solution ⇒ 80% water + 20% soluteThe solution in the beaker is hypertonic to the cell interior because its solute concentration is about 20%, which is greater than 15%.
The interior of the cell is hypotonic to the solution in the beaker, because it is more diluted. It has 85% water, which is higher than 80% water. Water tends to leave the cell moving forward to the beaker solution.
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Individuals of a population that are spread out irregularly over their environment with no discernable pattern are referred to as living in a(n) _____ distribution.
Individuals of a population that are spread out irregularly over their environment with no discernable pattern are referred to as living in a(n) random distribution.
What three categories of population are there?Age-sex distributions may be used to generate three different types of population pyramids: expanding, constrictive, and stationary. The term "population" usually refers to the total number of people living in a certain area, such as a city or town, region, nation, continent, or the entire planet. Governments frequently use censuses, a procedure for gathering, analysing, compiling, and releasing statistics on a population, to determine the number of the resident people under their jurisdiction.Population refers to a group of people who share certain established characteristics, such as location, race, ethnicity, nationality, or religion, in sociology and population geography. The social science of demography involves the statistical analysis of populations.To learn more about Population , refer to the following link:
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Based on its function in detoxifying drugs and alcohol, one would expect to find a large amount of smooth endoplasmic reticulum (ser) in ________ cells.
Based on its function in detoxifying drugs and alcohol, one would expect to find a large amount of smooth endoplasmic reticulum (ser) in liver cells.
What is endoplasmic reticulum (ER) ?In essence, the endoplasmic reticulum serves as the eukaryotic cell's transportation system in addition to performing numerous other critical tasks including folding proteins. Rough and smooth endoplasmic reticulum make up the two components that make up this particular sort of organelle.
The function of a endoplasmic reticulumIn general, the endoplasmic reticulum's job is to make proteins so that the remainder of the cell can operate. It can be smooth or rough. Ribosomes, which are tiny, elongated organelles with a round shape, are found on the rough endoplasmic reticulum and are responsible for producing those proteins.
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Why is it so important to engage readers in your narrative from the start-by revealing the conflict?
O so readers will want to continue reading
Oso readers will know the characters
Oso readers understand the story problem
so readers can predict the ending
Answer:
It's A, pretty obvious
Explanation:
I'm a bumblebee who likes to eat KFC
-Ash the Fox
la resouesta es A de la pregunta
Specialized myoepithelial cells can be found amid the secretory cells of which glands?
Specialized myoepithelial cells can be found amid the secretory cells of apocrine and merocrine sweat glands.
What are Glands?Glands may be defined as the cluster of cells in an animal's body that significantly synthesizes substances like hormones and liberate them into the bloodstream specifically. There are two types of glands that are typically present in humans.
Endocrine glands release the substances directly into the bloodstream.Exocrine glands release the substances into a duct or opening to the inside or outside of the body.Specialized myoepithelial cells are found amid the secretory cells at the deep end of the glands like apocrine and merocrine. Both of them are sweat glands.
Therefore, apocrine and merocrine are the glands that secrete specialized myoepithelial cells.
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__________ amino acids are those amino acids that do not need to be obtained from the diet because the body is capable of synthesizing (producing) them.
what happens in meiosis during telophase l? A) sister chromatids are pulled apart. B) four haploid cells form from each parent cell. c) two haploid cells are formed. d)four retreads form in the center of the cell.
Two haploid cells are formed during Telophase I.
A nuclear sheath may form around the bundle of chromosomes. Some species, like human females, go through the first four phases of meiosis before giving birth to the germline cells. For some period, the germline cells are in telophase I. When the gamete is required for reproduction, there is a second round of division.The parent cell has two poles at Telophase I of the meiotic cycle, each with a full complement of haploid chromosomes (which still have their sister chromatids).Now, a cleavage furrow forms, separating the cytoplasm of the cell in two (a process ultimately called cytokinesis). The two daughter cells start preparing for the second meiotic division as soon as the cytoplasm has completely divided.Therefore, option (C) is correct.
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A mutation occurred in the gene that encodes the enzyme sucrase, resulting in a single amino acid substitution in the active site of the enzyme. A polar amino acid was changed to a nonpolar amino acid. What is a likely result of this mutation?.
Answer: Sucrase will not be able to bind sucrose in the active site.
Explanation:
The __________ is located under the forebrain and midbrain. a. forebrain b. midbrain c. hindbrain d. brainstem please select the best answer from the choices provided a b c d
Answer:
it's C
Explanation:
How does the cryosphere help the biosphere ability to sustain life?
Answer: The cryosphere acts like a reflective shield, protecting Earth from getting too warm.
Explanation:
Snow and ice reflect more sunlight than open water or bare ground. The presence of snow and ice affects the heat and cooling of the earth's surface, affecting the planet's energy balance.
What happens during glycolysis? more atp is consumed than is produced. glucose is broken down into two pyruvate molecules. carbon dioxide is produced. lactic acid is produced.
The statement indicating that 'glucose is broken down into two pyruvate molecules' is an accurate description of what happens during the process of glycolysis.
What do glycolysis and cellular respiration mean?Glycolysis represents the first stage of the process of cellular respiration by which aerobic cells use energy from foods such as glucose to produce ATP and other molecules that serve as energy sources.
During glycolysis pyruvic acid or pyruvate is generated from glucose, and also is generated ATP, the energy coin of eukaryotic cells, while lactic acid is produced during the fermentation process in conditions associated with the absence of oxygen, which is known as hypoxia conditions (anaerobic cell generation of energy).
In conclusion, the statement indicating that 'glucose is broken down into two pyruvate molecules' is an accurate description of what happens during the process of glycolysis.
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Where is most of the mass of an atom found?
ONeutrons
O Electron cloud
Nucleus
Answer:
The Nucleus
Explanation:
Not only is it simply the heaviest, but it is the largest of the three options. Neutrons are extremely light compared to the nucleus. The electron cloud is even less, I believe.
What is the highest level of protein structure in human insulin, which has two polypeptides of different mass linked by several disulfide bonds?
The highest level of protein structure in human insulin, which has two polypeptides of different mass linked by several disulfide bonds Quaternary structures.
The fundamental structure of a protein is only the arrangement of the amino acids in a polypeptide chain.In a medical environment, a doctor or nurse may also administer intravenous (into a vein) injections of human insulin solution. You will be closely observed by a doctor or nurse for side effects. Although it can reduce blood sugar levels, human insulin can not treat diabetes.Disulfide bonds are important because they control the stability and conformational dynamics of proteins. The case of proteins, which are frequently disulfide linked and must survive stresses resulting from their typical biological function, is particularly significant.To learn more about insulin.
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Enter a nuclear equation for the fusion of two h-2 atoms to form he-3 and one neutron. express your answer as a nuclear equation.
The nuclear equation that represents the fusion of two H-2 atoms to form He-3 and one neutron is
[tex]\frac{2}{1} h + \frac{2}{1} h > > > > \frac{3}{2} he + \frac{1}{0} n[/tex]
In a nuclear reaction the nuclides are represented with the chemical symbol preceded by a superscript that represents the mass number (number of protons plus neutrons) and a subscript that represents the atomic number (number of protons).
What is a Nuclear reaction ?A nuclear reaction is a process in nuclear physics and nuclear chemistry where two nuclei or a nucleus and an outside subatomic particle meet to create one or more new nuclides. Consequently, at least one nuclide must change throughout a nuclear reaction.
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Describe two effects that a change in the sequence of amino acids would have on a protein.
Intricate molecules make up proteins.
The way a protein folds up determines the distinct three-dimensional form that it has. It cannot do its task in the cell if it does not fold up into the proper shape. Amino acid linkages, which are dispersed along the protein molecule, are what give a protein its shape. The bond cannot form if the incorrect amino acid is present, preventing the protein from adopting the proper shape and performing its function. For instance, the illness sickle cell anemia is brought on by a single fatal error in the amino acid sequence of the hemoglobin molecule!
Proteins are made from chemical 'constructing blocks' called amino acids. Your body uses amino acids to construct and repair muscle mass and bones and to make hormones and enzymes.
They also can be used as an power source. you can without problems meet your day by day protein needs via following the Australian nutritional recommendations.
Proteins are big biomolecules and macromolecules that contain one or extra lengthy chains of amino acid residues.
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What is a common location for both bacterial ribosomes and eukaryotic ribosomes?
Answer:
Perhaps the common location would be within the cytoplasm.
Explanation:
This is because eukaryotic organisms have their organisms bound within their cell membranes, one such organelle would be their ribosomes. The same is true for bacterial cells in which their organelles are bound within their cell membranes as well, one such organelle would also be their ribosomes. Hence, the similarity, which in this case is their ribosomes, both reside within the cytoplasms.
To the cytoplasm of a cell and is involved in many cellular activities
Answer:
like the building of proteins
Explanation:
Flashcards.
Epithelial cells of kidney tubules may have many microvilli. what is the reason for the microvilli?
To expand the surface area of the tubule and maximize the reabsorption of vital chemicals, the cells lining the proximal convoluted tubule develop microvilli. Microvilli are hair-like protrusions that come from a cell's nucleus.
Reabsorption- Water and other solutes are reabsorbed as they return from the tubule to the plasma. Over the whole length of the renal tubule, various amounts of water and particular solutes are reabsorbed.
Proximal Convoluted Tubule (PCT)- Between Bowman's capsule and the loop of Henle, the proximal convoluted part of the vertebrate nephron plays a key role in the resorption of water, sodium, and chloride ions, and sugar from the glomerular filtrate.
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Dna helicase inhibitors are well studied as potential drug targets. What would you expect to see if dna helicase activity is inhibited?.
DNA strands are separated and ATP hydrolysis is catalyzed by the helicase, preventing the unwinding of the double helix.
What is helicase?Nucleic acid or nucleic acid protein complexes can be altered or bound by enzymes referred to as helicases. Helicases are present in both DNA and RNA. DNA helicases are essential for DNA replication because they separate double-stranded DNA into single strands, enabling each strand to be copied. During DNA replication, DNA helicases unwind DNA at regions known as origins, where synthesis will start. The replication fork is a structure that develops as the DNA helicase unwinds the DNA. It is so called because the two strands of DNA appear to fork as they are unzipped apart. The hydrogen bonds that bind the nucleotide base pairs of the double-stranded DNA together must be broken using energy.Learn more about the helicase with the help of the given link:
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The fibrous, bracelet-like sheet of connective tissue on the anterior side of the wrist is called the?
The fibrous, bracelet-like sheet of connective tissue on the anterior side of the wrist is called the flexor retinaculum.
What is flexor retinaculum?The band of fibrous connective tissue known as the flexor retinaculum creates the anterior ceiling of the carpal tunnel. The transverse carpal ligament and the annular ligament are frequently used interchangeably when discussing the flexor retinaculum. for the purposes of this article, both will be treated as one component. What two jobs do the flexor retinaculum perform?The primary purposes of the flexor retinaculum are to stabilize the carpal system and act as a pulley for the carpal flexor muscles. Additionally, the muscles of the thenar and hypothenar eminences are derived from the volar surface.How is the flexor retinaculum created?Its distal portion is an aponeurosis between the thenar and hypothenar muscles, while its central portion is the transverse carpal ligament. The thicker antebrachial fascia is detachable from the proximal section of the flexor retinaculum on the outside.To learn more about flexor retinaculum visit:
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5) which body system does each of the 3 germ layers give rise to?
Answer:
Germ layers - Groups of cells that form 3 distinct regions of the embryo & give rise to specialized cells and organs.
Ectoderm - Epidermis and nervous system
Mesoderm - Heart, kidney, gonads, bones and muscle.
Endoderm - Lungs and digestive system.
Explanation:
Cells in each germ layer differentiate into tissues and embryonic organs. The ectoderm gives rise to the nervous system and the epidermis, among other tissues. The mesoderm gives rise to the muscle cells and connective tissue in the body. The endoderm gives rise to the gut and many internal organs.
Serous membranes line certain cavities within the anterior body cavity.
a. true
b. false
Serous membranes line certain cavities within the anterior body cavity. This statement is FALSE.
Serous membrane, also known as serosa in anatomy, is a silky tissue membrane made of mesothelium that lines the interior of bodily cavities and their contents. It secretes serous fluid to permit greased sliding motions between friction surface. Organs housed in body cavities that don't open up to the outside are covered by serous membranes that line the body cavities. The epithelium secretes a thin coating of serous fluid that coats serous membranes.
An indication of a serous membrane is the lining of the thorax. The pleura is the name for the serous membrane found in the thorax. The visceral pleura, the innermost layer, is on the lungs, whereas the parietal pleura, the outermost layer, is on the interior layer of the thorax.
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