In a population at Hardy-Weinberg equilibrium for a locus with two alleles, there is no allele frequency at which the heterozygote frequency is lower than both of the two homozygous frequencies.
Under Hardy-Weinberg equilibrium conditions, the frequency of heterozygotes (individuals with one copy of each allele) is equal to the product of the frequencies of the two alleles. This means that the frequency of heterozygotes can never be lower than the frequencies of either of the two homozygotes (individuals with two copies of the same allele). In other words, if a population is at Hardy-Weinberg equilibrium for a locus with two alleles, there is no allele frequency at which the heterozygote frequency is lower than both of the two homozygous frequencies. For example, consider a locus with two alleles, A and a. Let p be the frequency of the A allele and q be the frequency of the a allele. The Hardy-Weinberg equilibrium equation for the frequency of heterozygotes (individuals with one copy of each allele) is: Heterozygote frequency = pq The Hardy-Weinberg equilibrium equation for the frequency of homozygotes (individuals with two copies of the same allele) is: AA frequency = pp aa frequency = q^2. Since p and q are between 0 and 1, it is not possible for either p or q to be less than 0, and therefore it is not possible for either p^2 or q^2 to be less than 0. Therefore, it is not possible for the frequency of either of the two homozygotes to be less than 0. Since the frequency of heterozygotes is equal to pq, which is the product of p and q, and since both p and q are greater than or equal to 0, it is not possible for the frequency of heterozygotes to be less than either of the two homozygotes. Therefore, in a population at Hardy-Weinberg equilibrium for a locus with two alleles, there is no allele frequency at which the heterozygote frequency is lower than both of the two homozygous frequencies.
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explain the major features of an operon, including what sites would be found in this type of bacterial promoter in e coli
An operon is made up of several structural genes that are linked together by a common promoter and controlled by a common operator. The upstream regulatory region of the bacterial coding regions contains the promoter, that is, the DNA sequence which determines specific recognition by RNAP
An operon is made up of three basic pieces of DNA:
A promoter is a nucleotide sequence that enables gene transcription.An operator a repressor binds to an operator, which is a segment of DNA.Structural genes are those that are regulated by an operon.Operons are areas of DNA that encompass clusters of associated genes. They consist of a promoter region, an operator, and several related genes. The operator can be found within the promoter itself or somewhere between the promoter and the genes. By binding to the promoter region, RNA polymerase initiates transcription.
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The ________ is a highly conserved amino acid sequence found in immunoglobulin, tcr, and mhc proteins.
Answer: I have no idea
Explanation:
but good luck
what is upwelling A. when infertile species reproduce B. the productivity of an ecosystem C. the mixing of 2 biomes D. water moving up from the benthic zone.
Upwelling is the process of cold, nutrient-rich water moving up from the deep ocean to the surface. This can occur when wind blowing over the surface of the ocean pushes surface water away, causing the deeper, colder water to rise up to replace it. Upwelling is important because it brings nutrients from the deep ocean to the surface, where they can be used by phytoplankton and other primary producers to support the growth of other marine organisms. Upwelling is a major factor in the productivity of marine ecosystems and plays a key role in the global climate system.
Chooe the tatement that bet decribe the Moon' landcape. Pare vegetation, very little eroion, andy oil
riverbed with boulder, dut torm, bad weather
almot flat and featurele with ome rolling hill
powdery oil, crater, mountain, valley
According to the question, there are several craters that were created by volcanic eruptions in Maria.
What triggers erosion?When earth is exposed to high winds, heavy rains, and moving water, soil erosion predominantly takes place. Some anthropogenic impacts, like farming and clearing land, make soil more prone to erosion.
What is the straightforward meaning of erosion?Mud - brick minerals are worn away during erosion, a geology process in which they are moved by wind or water. Buffeting, a related process that does not involve movement, degrades or breaks down rock. A little rock fragment being carried away from a mountainside by the wind as an illustration of erosion.
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The correct question is-
Choose the statement that best describes the Moon's landscape.
A. sparse vegetation, very little erosion, sandy soil
B. riverbeds with boulders, dust storms, bad weather
C. many craters, maria formed from volcanic eruptions
D. almost flat and featureless with some rolling hills
what are the min, max and optimal for psychrophiles, mesophiles, thermophiles and hyperthermophiles?
Psychrophiles (<15 °C), mesophiles (20–45 °C), thermophiles (45–80 °C) and hyperthermophiles (>85 °C).
According to the range of temperatures at which they can grow, microbes can be loosely categorized. At the temperature where the organism can grow at its fastest rates. Its minimal growth temperature is the lowest temperature at which the organism can endure and reproduce. Its maximal growth temperature is the highest temperature at which growth is possible. The acceptable growth temperature ranges listed below are simply estimates and may change depending on other environmental conditions.Mesophiles, or "middle-loving," organisms are acclimated to moderate temperatures, with ideal growth temperatures falling between room temperature (about 20 °C) and 45 °C. Psychrotrophic organisms, also referred to as psychrotolerant organisms, favor cooler settings, ranging from a high temperature of 25 °C to refrigeration. Extreme psychrophiles are the creatures recovered from northern lakes like Lake Whillans (cold loving). Microorganisms known as psychrophiles can grow at temperatures as low as 0 °C and have an ideal growth temperature of
temperatures about 4 °C, and typically cannot survive at temps beyond 20 °C.
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Select the post-translational modifications of histones that are most commonly associated with changes in transcription levels in eukaryotes.
a. acetylation and lipidation
b. methylation and acetylation
c. glycosylation and ubiquitination
d. methylation and carboxylation
Correct option C - methylation as well as acetylation
A DNA molecule is acetylated when an acetyl group is added, and a DNA molecule is methylated when a methyl group is added.
It is generally known that both histone deacetylation and DNA methylation inhibit gene transcription. In contrast, when histones are deacetylated by HDAC, their electrostatic contacts with DNA become stronger, resulting in relaxed chromatin that upregulates transcription.
Histone acetylation and DNA methylation are examples of epigenetic changes. However, histone acetylation is a chemical covalent modification that occurs in proteins as a post-translational modification of histone proteins, whereas DNA methylation occurs at the DNA level.
Histone modification, which includes methylation, phosphorylation, acetylation, ubiquitylation, and sumoylation, is a covalent post-translational modification of histone proteins. These changes to chromatin structure can regulate gene expression.
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farmers need to make many decisions about how they grow their crops. one of these decisions is whether to use synthetic fertilizer or organic fertilizer, such as manure. t or f
Farmers need to make many decisions about how they grow their crops. one of these decisions is whether to use synthetic fertilizer or organic fertilizer, such as manure is true.
Organic fertilizers are readily available mineral sources that have a sufficient concentration of vital minerals for plants. They have the ability to reduce issues brought on by synthetic fertilizers. They reduce the requirement for recurrent synthetic fertilizer applications to maintain soil fertility. They maintain nutrient balance for the proper growth of agricultural plants and gradually release nutrients into the soil solution.
In comparison to chemical fertilizers, the organic fertilizers are safer. However, using organic fertilizers incorrectly might result in over fertilization or nutrient deficiencies in the soil. Therefore, the regulated release of organic fertilizers is a cutting-edge and efficient technique to mitigate these effects and keep the output of sustainable agriculture.
The usage of organic fertilizers offers the advantages of being affordable, enhancing soil texture, aeration, structure, and water retention while also promoting the growth of healthy roots. Minerals, animal sources, sewage sludge, and plants are just a few of the sources for organic fertilizer.
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the half-life of carbon 14 is 5,730 years. A bone originally contained 20 grams of carbon 14. How many grams of carbon 14 would be left after 3 half lives show your work
If the half-life of carbon is 5.730 years, a bone containing 20 grams of carbon 14 would be left with 2.5 grams after 3 half-lives.
What is half-life?The half-life of a substance is the period of time it takes for half of the amount of the substance to decay.
The half-life of a decaying substance is given by the following mathematical expression:
N (t) = [tex]N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} }[/tex]
Where N(t) is the quantity remaining, [tex]N_o[/tex] is the initial quantity, t is the time that has elapsed, and [tex]t_\frac{1}{2}[/tex] is the half-life.
In this case, [tex]N_o[/tex] = 20, t = 3x5730 and [tex]t_\frac{1}{2}[/tex] = 5,730 years
[tex]t/t_\frac{1}{2}[/tex] = 3x5730/5730 = 3
Substituting:
N(3) = [tex]20(1/2)^3[/tex]
= 2.5 grams
In other words, the amount of carbon 14 that would be left after 3 half-lives would be 2.5 grams.
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what evolutionary advantage does compartmentalization of core metabolic processes offer eukaryotes? responses evolution of the mitochondria allowed eukaryotes to perform respiration. evolution of the mitochondria allowed eukaryotes to perform respiration. with the evolution of mitochondria in eukaryotes, the krebs cycle and electron transport chain also evolved. with the evolution of mitochondria in eukaryotes, the krebs cycle and electron transport chain also evolved. evolution of a nucleus in eukaryotes separates the processes of transcription and translation and they can be regulated separately. evolution of a nucleus in eukaryotes separates the processes of transcription and translation and they can be regulated separately. a nucleus in bacteria provides separation of respiration from transcription.
the ________ is a highly conserved amino acid sequence found in immunoglobulin, tcr, and mhc proteins.
Immunoglobulin, tcr, and mhc proteins all contain the C domain, which has a conserved amino acid sequence.
What are some examples of amino acids?The nine amino acids histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are thought to be essential. The non-essential amino acids are serine, alanine, aspartic acid, asparagine, and aspartic acid.
What time of day should I take my amino acids?Protein eaten right before bed is efficiently digested and absorbed, enhancing the availability of amino acid residues while you sleep overnight. Greater amino acid availability while you sleep increases muscle protein synthesis rates and enhances the net protein equilibrium throughout your body during overnight recovery.
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The Threatened Specie Act prohibit trade or product made from threatened or endangered pecie. True
Fale
The given statement is TRUE. A foundation for the conservation and protection of threatened species and endangered species, as well as their habitats, both domestically and overseas, is provided under the Endangered Species Act of 1973.
In accordance with ESA, critical habitat must be identified and its removal is forbidden. The Endangered Species Act establishes protections for fish, mammals, and plants that are categorized as threatened or endangered. It allows for the addition and deletion of species from the list of threatened and endangered species as well as the creation and implementation of recovery plans. A threatened species is one that "is likely to become an endangered species within the foreseeable future throughout all or a considerable portion of its range," according to the ESA.
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streptomyces, mycobacterium, pseudomonas, bacillus, and clostridium are bacterial genera that may all be involved in what process that is important for plant growth and ecosystem health?
The bacterial genera streptomyces, mycobacterium, pseudomonas, bacillus, and clostridium are all involved in the process of nitrogen fixation that is important for plant growth and ecosystem health.
Nitrogen fixation is the process of converting the environmental nitrogen into usable forms by the plants. This is done by the legumes of the plants as well as the various nitrogen fixing microorganisms. biological fixation of nitrogen is the major process through which nitrogen is fixed.
Ecosystem is comprised of the abiotic and biotic factors of an area existing by being interdependent one each other. The abiotic factors are the rocks, soil, temperature, wind, sunlight, etc.
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what is the product of meiosis 2
A. Two diploid cells
B. Four diploid cells
C. Four haploid cells
D. Two haploid cells
Answer: C. Four haploid cells
Explanation: The product is four haploid cells that each have one copy of every chromosome.
how would you determine the probability of getting an f2 offspring that is homozygous recessive for both traits?
With the help of Punnett square, we can determine that there is a 25% probability of getting an f2 offspring that is homozygous recessive for both traits.
To determine the probabilities, we can utilize a Punnett square table or just do some simple scenario planning. Each parent has a genotype of Ff, where each allele has an equal chance of being passed on to a child. Therefore, there is a 50% chance that a parent will contribute the dominant allele F1 and a 50% chance that a parent will contribute the recessive allele f2. Here is a list of the possibilities:
There is a 50% x 50% = 25% probability that both of the offspring's alleles are dominant.
There is a 50% x 50% = 25% probability that both of the offspring's alleles are recessive and homozygous.
There is a 50% x 50% + 50% x 50% = 25% + 25% = 50% probability that the offspring is heterozygous.
Therefore, for parents who share the genotype F1F2, there is a 25% chance that their offspring will be F1F1, a 25% chance that they will be F2F2, and a 50% chance that they will be F1F2. These probabilities are significant because of what comes afterward.
The complete question is:
When Mendel set up a Parental (P) cross between true-breeding purple and white flowered plants to generate the F1 and then allowed the F1 to self-pollinate to generate the F2 he saw a dominant-to-recessive ratio of 3:1, how would you determine the probability of getting an f2 offspring that is homozygous recessive for both traits?
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if an animal is in respiratory distress, many times the veterinarian will request they be positioned lying on their belly for chest films. what position is this called?
"The veterinarian will frequently suggest that an animal be placed laying on its tummy for chest films if it is experiencing respiratory distress. This posture is referred to as dorsoventral.
The term "radiographic positioning" refers to the placement of the body, or more specifically, to the region of the body that is closest to the focal plane. The primary imaging technique used to assess thoracic trauma, particularly rib fractures and related sequelae, is computed tomography (CT). Studies have demonstrated that even in individuals with first radiographs that are normal, CT can reveal serious illnesses (such as thoracic aortic damage) (3)."The veterinarian will frequently suggest that an animal be placed laying on its tummy for chest films if it is experiencing respiratory distress. This posture is referred to as dorsoventral. LIVER. Between both the diaphragm and the stomach, on the cranial side of the abdomen, is where the liver is situated. The majority of the apparent liver mass is to the right of midline.
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each cell of the body combines nutrients and oxygen and produces energy and waste products through a process called:
Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
During the process of cellular respiration, the oxidation of biological fuels takes place in the presence of an inorganic electron acceptor, such as oxygen, and large amounts of energy are produced that are needed to power the initial creation of ATP. The process through which chemical energy from food is converted into adenosine triphosphate (ATP) in an organism's cells, followed by the ejection of waste products, is known as cellular respiration. Catabolic reactions, which reduce large molecules into smaller ones and release energy, lead to respiration. One of the main ways a cell releases chemical energy to power cellular activity is through respiration.
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How do the apical and lateral meristems produce primary and secondary growth in plants?
At the meristem, primary growth takes place (a meristem located at the tip of a stem). Due to the activity of the lateral meristems, primary growth results in an increase in the thickness or diameter of the plant body.
What is lateral meristem and its function?Because they are in charge of secondary growth, or an increase in branch girth and thickness, lateral meristems are sometimes referred to as secondary meristems. In wounded tissues, meristems regenerate from other cells and are in charge of repairing wounds.
Where does the lateral meristem work?The meristems found along the longitudinal axis area of plant roots and shoots are known as lateral meristems. The purpose of the lateral inflorescence is to enhance plant thickness. These are referred to as lateral meristems because cambium are found along the lateral surfaces of the stem and roots.
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A scientist treats a plant cell with a chemical that destroys the ribosomes. which cell process will be stopped as a result?
Answer:
Protein synthesis will stop.
Explanation:
Ribosomes is the organelle which carries out Protein synthesis, thus if it is destroyed, the cell process would be stopped.
What are the function of the Auxin hormone in plant's. Choose the correct answer
A ) ! ck jd pyk v zc !
B ) ! ck jd pyk v zc !
Auxin is a plant hormone that plays a crucial role in plant growth and development. Some of its main functions include:
Promoting cell division and elongation, which helps the plant grow taller and thicker
Regulating the development and growth of lateral buds, which helps the plant branch out and become more complex
Controlling the orientation of the plant's shoots and roots, which helps the plant absorb nutrients and anchor itself in the ground
Regulating the development of fruits and flowers, which helps the plant reproduce and spread its genetic material.
Overall, auxin plays a vital role in the plant's ability to grow, develop, and adapt to its environment.
Auxin is a plant hormone that plays a crucial role in plant growth and development. Some of its main functions include:
Promoting cell division and elongation, which helps the plant grow taller and thicker
Regulating the development and growth of lateral buds, which helps the plant branch out and become more complex
Controlling the orientation of the plant's shoots and roots, which helps the plant absorb nutrients and anchor itself in the ground
Regulating the development of fruits and flowers, which helps the plant reproduce and spread its genetic material.
Overall, auxin plays a vital role in the plant's ability to grow, develop, and adapt to its environment.
which description explains the type of energy conversion that occurs in the mitochondria through cellular respiration?
Utilizing the oxygen already present in the cell, mitochondria transform the chemical energy from food into energy that can be used by the host cell. It takes place inside mitochondria and is known as oxidative phosphorylation.
What about respiration?Respiration, a process of gas exchange, is the major purpose of the lungs.In the process of respiration, carbon dioxide, a waste product of metabolism, exits the blood and oxygen from the incoming air enters.When you breathe in and out, you may have lung pain on one or both sides of your casket.Technically, the soreness isn't exhaling from inside the lungs because they have so many pain receptors.Rather, the stuffing of the lungs, which does include pain receptors, might be the source of the discomfort.You lemon. You have a lung condition.You suffer from liver failure, cancer, diabetes, renal complaint, or cancer.Your vulnerable system has been compromised by specifics, a complaint, or organ transplant.Still, air pollution( both outside and within the home), or dust and gauze at work for an extended length of time, If you breathe in a cigarette bank.Eventually, if your airways become compromised, you might become more breathless.Damage to the lungs might occasionally have no honorable cause.Learn more about respiration here:
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fsh in females circulates to the ____________ where it induces folliculogenesis.
FSH in females circulates to the ovaries where it induces folliculogenesis.
A glycoprotein hormone called FSH has two peptide components in it. The well-known function of FSH in the development of follicles is to promote the growth of a sizable pre-ovulatory follicle that, as a result of its maturation in response to FSH, is able to ovulate and develop a corpus luteum in response to the mid-cycle surge of LH. In ovarian stimulation for assisted reproductive technologies, FSH is frequently employed. In order to enhance the number of oocytes and prevent an early LH surge, ovarian stimulation methods combine the use of human menopausal gonadotrophin, urinary FSH, or recombinant FSH with GnRH agonists or antagonists. Recently, innovative stimulation regimens combining recombinant FSH, recombinant LH, and GnRH antagonists have been made possible by the availability of recombinant LH.To know more about FSH check the below link:
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If you travel to the moon, what would be the effect on your mass and weight?
Answer:
The mass will stay the same on the moon, whereas the weight would decrease.
Explanation:
sometimes errors occur during transcription or translation. examine the codon chart on the previous page. notice that each amino acid is coded for by several different codons. for example, alanine is coded for by gcu, gcc, gca, and gcg. how might this offset transcription or translation errors?
Errors in transcription or translation can be offset by the redundancy of the genetic code. The codon chart displayed on the previous page shows that each amino acid is coded for by multiple different codons. This redundancy helps to reduce the likelihood of errors in translation or transcription.
For example, Alanine can be coded for by four different codons: GCU, GCC, GCA and GCG. This means that if a mutation occurs in the coding strand of DNA, such as a single base substitution, the new codon may still code for Alanine. As a result, the amino acid sequence will not be changed and the protein product of the gene will remain the same. This is known as a silent mutation and it can offset errors in transcription or translation.
The redundancy of the genetic code also helps to reduce the chances of errors occurring during translation. This is because, if a codon is misread, the cell can still recognize the correct amino acid. For example, if a cell misreads the codon for Alanine (GCA) as GAA, the cell will still recognize the correct amino acid because GAA is the codon for Glutamic Acid. This means that the protein product of the gene will remain the same.
In conclusion, the redundancy of the genetic code helps to offset errors in transcription and translation by allowing single base substitutions to go unnoticed and allowing codons to be misread without changing the amino acid sequence of the protein product.
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during semiconservative replication, the dna sequence act results in which sequence on the new strand?
Option a is Correct. The DNA sequence ACT on one strand of the original DNA molecule would result in the sequence TGA on the new complementary strand during semi-conservative replication.
Describe DNA:
All living things include a molecule called DNA (deoxyribonucleic acid) that contains their genetic code. Long chains of nucleotides, the fundamental constituents of DNA, make up its structure. Deoxyribose, a phosphate group, and a nitrogenous base make up each nucleotide. In DNA, nitrogenous bases come in four different varieties: adenine (A), cytosine (C), guanine (G), and thymine (T).
The original DNA molecule is unraveled and split into two strands during semi-conservative replication by helicase enzymes. An enzyme known as DNA polymerase uses these strands as templates to create new complementary strands. According to the DNA base-pairing regulations, the new strands are created by adding nucleotides that are complementary to the nucleotides on the template strands: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). As a result, the corresponding sequence TGA on the new strand would result from the sequence ACT on one strand of the original DNA molecule.
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Correct Question:
During semiconservative replication, the dna sequence act results in which sequence on the new strand?
a. ACT
b. TCA
c. TGA
d. UGA
if the permeability of the membrane to k , na , and cl- are 100, 3, and 10 respectively, what is the resting membrane potential of this cell?
The resting membrane potential of S-A node cell was investigated by observing the response of the membrane potential to change in [K+]O or [Cl-]O under the presence or absence of Na ion.
The slope of the change in membrane potential per decade change in [K+]O increased from 12.3 to 44 mV by removal of Na ion from the external medium, suggesting an extensive contribution of Na ion to the resting membrane potential. To determine the relative conductance between Na and K ions, Cl ion in Tyrode solution was substituted with SCN ion, which is 2.1 times more permeable than Cl ion, in order to eliminate the contribution of Cl concentration cell to the resting membrane potential. The contribution of the Cl ion to the resting membrane potential could be examined only in Na-free medium. Acetate ion has been reported to be 0.5 times less permeable than Cl ion. The replacement of Cl ion by acetate ion in various proportions caused a transient depolarization. The slope of this transient depolarization per decade change of [Cl-]O between 10 to 100 mM was determined to be -6.8mV. Under the assumption that the resting membrane potential could be determined by the parallel concentration cells for Na, K and Cl, relative conductance ratio between K, Na and Cl was calculated to be 1:0.58:0.15.
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What does it mean to examine all sides of scientific evidence of a scientific explanation?
Scientific evidence can be used to support or refute a scientific theory or hypothesis; however, scientists can also utilize evidence in other contexts, such as when they apply theories to real-world issues.
What three components comprise a scientific explanation?The assertion (or justification), the supporting data (or observations), and the justification (or the reasoning). explanation of the evidence's significance and the reasons it supports the assertion.
Claim + Evidence + Reasoning = Scientific Explanation
What should a scientific explanation include and in what order?An explanation of a situation, action, or idea that uses a predetermined set of scientific facts, principles, and presumptions. The steps of the scientific process should be followed in this order: observations, queries, hypotheses, experiments, interpretation of the results, and drawing conclusions.
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true or false? there is a high risk that crops engineered to contain insecticides will harm nondestructive species important to biodiversity. true false
Which size forest fragment would be most affected by habitat fragmentation over a given period of time?
A.1000 hectares.
B.1 hectare.
C.10 hectares.
D.100 hectares.
1 hectare size forest fragment would be most affected by habitat fragmentation over a given period of time.
Habitat fragmentation often modifications the microenvironment on the fragment facet, resulting in extended mild stages, higher sunlight hours temperatures, higher wind speeds, and lower humidity.
Each of those facet outcomes can have a big effect at the energy and composition of the species within the fragment.
Destruction and degradation of natural ecosystems are the number one reasons of declines in international biodiversity (1, 2). Habitat destruction commonly leads to fragmentation, the division of habitat into smaller and greater isolated fragments separated by way of a matrix of human-transformed land cover.
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PLEASE HURRY
How do cells conserve genetic information and still increase genetic variability?
What are the criteria for classification?
There are nine main criteria for classification:
SymmetryBody cavityAppendagesSkeletonSegmentationCirculatory systemEmbryonic developmentHabitatGerm layersThe criteria are :
Animals can be radially symmetrical, bilaterally symmetrical, or asymmetrical, according to the following classification criteria: 1. Animals' bodies may or may not be divided into segments. Animals may have organs or components that are attached to the trunk or outside of the body. Animals can have either an exoskeleton or an endoskeleton. Evolution of the embryoAn animal's circulatory system can be open or closed.Animals can have a coelomate, psuedocoelomate, or coelomate body cavity.Animals can be either terrestrial or aquatic in their habitat. Aquatic creatures can exist in both freshwater and saltwater.Animals can have diploblastic or triploblastic germ layers.To know more about criteria for classification refer here:
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