Explanation:
Animals have special features that help them to live in a particular place. Therefore this features is called adaptation.
1] Aquatic plants have leaves that float on the surface of water.
2] Thier leaves are rarely have stomata.
3] Thier leaves can perform all the work without xylem.
4] They are usually lack cuticle layer in order to avoid excessive dryness.
Answer:
The most common adaptation is the presence of lightweight internal packing cells, aerenchyma, but floating leaves and finely dissected leaves are also common. Aquatic plants can only grow in water or in soil that is frequently saturated with water.
Four characters of aquatic plants are as given below:
1) most aquatic plants donot need culticles or have thin culticles as cuticles prevent loss of water.
2) aquatic plants keep their stomata always open for they do not need to retain water.
3) on each side of their leaves are a number of stomata.
4) aquatic plants have less rigid structure since water pressure supports them.
Explanation:
I hope this answer help you.
In large populations, small fluctuations in survivorship or reproduction among individual organisms are unlikely to affect allele or genotype frequencies in the population.
a. True
b. False
Answer: True.
Explanation:
A population is defined as the set of individuals that inhabit a given geographic area. A population has a certain allele frequency, which is the measure of the relative proportion of alleles in a given population, expressed as a percentage or unit. It is estimate using the number of times the allele is found in a locus and dividing it by the total number of alleles. While the genotypic frequency refers to the number of times that each of the genotypes generated by the two-by-two combinations of the alleles involved in the locus under study appears in relation to the total number of genotypes (which will be equal to the total number of individuals included in the study).
The population can be increased or decreased according to the birth and death rates. Generally, unless specific alterations occur, such as the spread of a disease, immigration, emigration, natural disasters, and others, the size of the population will remain constant. This means that the birth rate is quite similar to the death rate. And the larger the population, the more difficult it is to disturb this balance between births and deaths. So if small fluctuations in survival or reproduction occur between individuals, it is unlikely that this will affect the frequency of alleles and/or genotypes. This is explained using the Hardy-Weinberg principle states that the genetic composition of a population remains in equilibrium as long as no mutation occurs, and nor natural selection nor any other factor acts. After a generation of random mating, the frequencies of the genotypes of a locus are fixed at an equilibrium value. Then, the genetic variation in a population will remain constant from one generation to the next in the absence of extreme disturbing factors such as those mentioned above (diseases, natural disasters, and others).
Note that for this principle to be fulfilled, the population must be diploid (have two alleles of each gene), must reproduce sexually in a random manner, and must be large enough to minimize the effect of genetic drift (random fluctuations in allele frequencies from one generation to the next, due to random events that can cause certain traits to become dominant or disappear from a population).
• Describe genetic______ and gene_________ as mechanisms of evolution.
Answer:
genetic is branch of science deal with study of heredity and genes
genes is segment of DNA which transfer parental character from one generation to another
Sperm is produced in the?
Answer:
testis
Explanation:
produced from the testicals
Answer:
testis
Explanation:
produced from the testicals
Which is the main light-absorbing pigment for photosynthesis?
O carotene
O chlorophyll
O hemoglobin
O anthocyanin
Answer:
ChlorophyllExplanation:
Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly.
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll.
Answer:
B) Chlorophyll
Explanation:
The chloroplasts, which contain the green pigment chlorophyll, are where photosynthesis takes place. Chlorophyll is the pigment that gives plants their distinctive color. It works by collecting the energy in the sunlight that strikes the plant. Because grass requires photosnthesis to create glucose, which is required for growth inside the grass, photosynthesis is critical to life on Earth. As a result, creatures that eat the grass get energy, and so on. As a result, photosynthesis is the mechanism through which energy is introduced into an environment.
OAmalOHopeO
The frequency of a lethal allele in a population is greatest when it is: Group of answer choices dominant manifested in infancy recessive co-dominant
Answer:
recessive
Explanation:
A lethal allele is a gene variant associated with a mutation in an essential gene, which has the potential to cause the death of an individual. In general, lethal genes are recessive because these alleles do not cause death in heterozygous individuals, which have one copy of the normal allele and one copy of the allele for the lethal disease/disorder. In recessive lethal diseases, heterozygous individuals are carriers of the recessive lethal allele and can eventually pass the 'defective' allele on to offspring even though they are unaffected; whereas dominant lethal diseases are caused by dominant lethal alleles, which only need to be present in one copy to be fatal. In consequence, the frequency of recessive lethal alleles is generally higher than dominant lethal alleles because they can be masked in carrier individuals. Some examples of human diseases caused by recessive lethal alleles include, among others, Tay-Sachs disease, sickle-cell anemia, and cystic fibrosis.
The frequency of a lethal allele in a population is greatest when it is: C. recessive.
A lethal allele can be defined as an allele that is responsible for the death of a living organism, especially by preventing its development. Thus, a lethal allele causes a complete mortality in the living organism carrying it, in a hom-ozygous condition.
Basically, a lethal allele is recessive in nature because it is expressed in the phenotype of an organism. Some examples of diseases caused by lethal alleles in humans are:
Cystic fibrosisSickle-cell anemiaAchondroplasiaIn conclusion, a lethal allele that is recessive has the greatest frequency in a population.
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Bert has blonde hair (b). Molly has brown hair (B), but her genotype is Bb, meaning she carries a recessive blonde allele. What is the likelihood of Bert and Molly's second child having brown hair?
Answer:
50%
Explanation:
Iif you do a punnet square you get Bb, Bb, bb, and bb
since blond is represneted by the recessive bb it's a 50% the child will have blond hair
The layer of soil that contains the most organic material is called the
a. A
C C
b. B
d D
Answer:
That layer is called the a horizon, so the answer is A.
Explanation:
Humans are diploid; every individual carries only two alleles.
a. True
b. False
Biomagnification results in higher amounts of toxic substances for organisms on the food chain
True
False
Answer:
Biomagnification results is higher in amount of toxin substances so the answer is true
Explanation:
As regards the use of animal models,
Select one:
a.
Animals can model anything in the realm of human psychology
b.
The rat brain is completely different from a human brain in its neuroanatomy
c.
The 5-choice serial reaction time task is a way to operationalize spatial memory and spatial learning
d.
Rats can drive little cars
e.
All of the other answers are correct
Answer:
b number is the answer is it ok
Below is an image of a nucleus before it divides via meiosis. The chromosomes shown in red are from the female parent, and the chromosomes
in blue are from the male parent. Predict the gametes that can be created from this organism and explain the reason these different gametes are
possible.
Answer:
I predict that the gametes will be unique from their parents.
Explanation:
I predict that the chromosomes will pair up, with each pair having a red chromosome and a blue chromosome, then they'll cross over and exchange similar genetic information with each other. I think this because variety is important for any species for survival.
Compared to ocean crust near deep-sea trenches, crust near ocean ridges is ____.
Select one:
a.
younger
b.
the same age
c.
older
d.
magnetically reversed
Answer:
a. younger
Explanation:
HI friends good morning
What is the correct order of the levels of organization in animals from smallest to largest?
Answer:
Molecules, cells, tissue, organ, organ system, organism, population, community, ecosystem, and biosphere are in the correct order of the organization's levels.
Explanation:
Molecule: Atoms, the smallest unit of chemical elements are built up of molecules. You can find it in any matter, whether it lives or not. The most fundamental structures of biological creatures are molecules. Biochemistry and molecular biology are two biological fields focused on this level.
Cell: A cell is the basic unit of life. Two types of cells exist plant cells with a stiff cell wall consisting of cellulose molecules and animal cells with a flexible cell membrane. Cell biologists examine problems like metabolism and other structure and functional questions within and between cells.
Tissue: Tissue consists of cells working together to accomplish a goal. Some tissues include muscle, connective tissue, and neural tissue. Examples of biologists working at this level are histologists.
Organ: An organ is a tissue system that works at bigger scales together to perform specified work in the body of an animal. Brain, heart, and lungs are examples of organs. Anatomy is an example of a specialty in biology which concerns this level.
Organ system: An organ system is a group of bodies that work together to fulfill certain activities of the body. Air systems are used to inhale oxygen and release carbon dioxide in animals, for example, by the lungs, respiratory tract, and muscles. The function of the corpus when working jointly is studied by physiologists. Although physiologists can work at any level, they commonly address queries about organ systems.
Organism: An organism is an autonomous and recognized person. The organisms might be single-cell or multi-cell organisms consisting of organisms and organ systems, as well as bacteria, amiable, or creatures. An example of a multi-cellular organism is a human being.
Which structures allow lycophytes to grow bigger than mosses and liverworts?
A. gametophytes and sporophytes
b. xylem and phloem
C. haploid and diploid
D. roots and stems
The structure that allows lycophytes to grow bigger than mosses and liverworts is xylem and phloem which is option B
Lycophytes are spore bearing vascular plants. Being a vascular plant, they possess vessels ( vascular tissues) which include:
ylem: this is used for conducting water usually from the root to the rest of the plant partsPhloem: this is the vascular tissue that is used to conduct food( sugar) produced in the leaves of plants to other parts of the plant.The possession of the vessels makes the lycophytes appear bigger.
Mosses and liverworts belongs to the plant phylum Bryophyta. They do not have any vascular tissues that can be used to conduct water and food. This restricts their size.
Therefore, the structure that allows lycophytes to grow bigger than mosses and liverworts is xylem and phloem
Learn more about xylem and phloem here:
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Answer:
xylem and phloem
Explanation:
Lycophytes have specialized tissue that transports nutrients and provides structural support.
Complete the comparison of the metabolic pathways leading to thymine in DNA and thymine as a modified base in tRNA.
Thymine in DNA occurs as the result of thymidylate synthase creating _______________ , which then undergoes ____________ to ____________, then to __________, and incorporated into DNA by ___________.
Answer:
The question is incomplete, the complete question is as follow:
Thymine in DNA occurs as the result of thymidylate synthase creating _______, which then undergoes _______ to _______, then to _______, and incorporated into D N A by _______. Thymine in tRNA arises ________, by an S-adenosylmethionine-dependent _______ of a ______ residue in RNA.
Answer:
Thymine in DNA occurs as the result of thymidylate synthase creating dTMP, which then undergoes phosphorylation to dTDP, then to dTTP, and incorporated into DNA by DNA polymerase. Thymine in tRNA arises posttranslationally, by an S-adenosylmethionine-dependent methylation of a UMP residue in RNA.
Explanation:
Thymidylate synthase is a key enzyme that catalyzes the synthesis of 2′-deoxythymidine-5′-monophosphate (dTMP) from 2′-deoxyuridine-5′-monophosphate (dUMP). This enzyme catalyzes the addition of a phosphate group (phosphorylation) of dTMP in order to form thymidine 5'-diphosphate (dTDP). Once synthesized, dTMP can be metabolized to deoxythymidine triphosphate (dTTP), which is a precursor for DNA biosynthesis. On the other hand, transfer ribonucleic acid (tRNA) is methylated after the molecule is synthesized. The transfer of the methyl group is catalyzed by an S-adenosylmethionine–dependent methyltransferase that catalyzes the methylation of uridine monophosphate (UMP) using SAM (S-adenosylmethionine) as the methyl donor.
explain how the mammalian skin perform it's role as a thermoregulatory
Answer:
The skin contains many blood capillaries and sweat glands ,the sweat glands secrete sweat when it is hot.when the sweat evaporates from the skin it cools the body.thermoregulation by the skin occurs through dilation and constriction of the blood vessels.when the bodies temperature raises,the blood vessels carry heat in the blood to the skin.the blood capillaries dilate become wider so that more heat can be lost to the environment.this is called vasodilation.when the outside temperature is low,the blood capillaries constrict become narrower so that less blood flows to the surface of the skin.therefore less heat is lost to the environment this is called vasoconstriction.
I hope this helps
Analyze the property of water you investigated and provide some real-world applications of the importance of this property of water. I did Surface Tension. Please Help!
Answer:
Water (H
2O) is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound[18] and is described as the "universal solvent"[19] and the "solvent of life."[20] It is the most abundant substance on the surface of Earth[21] and the only common substance to exist as a solid, liquid, and gas on Earth's surface.[22] It is also the third most abundant molecule in the universe (behind molecular hydrogen and carbon monoxide).[21]
What is the answer with explaining
Answer:
EeWw
Explanation:
This question involves two genes; one coding for earlobes and the other for hairline. According to the question, one parent is homzygous recessive for earlobe but homzygous dominant for hairline i.e. (eeWW) while the other parent is homzygous dominant for unattached earlobes but homzygous recessive for hairline i.e. (EEww).
The cross between the two parents is as follows: eeWW × EEww. The following gamete combination will be produced by each parent:
eeWW - eW, eW, eW, eW
EEww - Ew, Ew, Ew, Ew
Using these gametes in a punnet square, the following proportions of offsprings will likely be produced:
All EeWw offsprings
Which of the following parts of a prokaryote is the part of the cell membrane that is folded in and thought to be used
for helping DNA replicate?
A. Mesosome
B. Genophore
C. Peptidoglycan
D. Cell wall
Answer:
a
Explanation:
: an organelle of bacteria that appears as an invagination of the plasma membrane and functions either in DNA replication and cell division or excretion of exoenzymes.
The following part of the cell membrane that is folded in and thought to be used for helping DNA replicate is the mesosome. The correct option is A.
What is mesosome?Mesosome is a round organelle that is present in prokaryotic organisms like bacteria. These organisms present as introversion in the plasma membrane. This organ helps in many functions of the cell like DNA replication and cell division.
DNA replication is a process of replicating DNA in other cells. It happens in the process of cell division. In bacteria cells, mesosomes help in the distribution of DNA into the daughter cells during the division.
Thus, the correct option is A. Mesosome regarding the organelle present in the bacteria helps in DNA replication.
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The neurons that carry from the brain to the muscle are called ?
Answer:
Motor Neurons
Answer:
The neurons that carry messages to the muscles are called motor neurons.
What kind of claim type does this statement make? Abbey Road is a much better album than Let It Bleed.
Select one:
a.
value
b.
policy
c.
fact
The kind of claim type does this statement is the value claim.
A claim of value refered to something as either good or bad, or that one thing is better than another thing. Example of value: Abbey road album is better than let it bleed.Conclusively we can therefore say that option A is the answer that best fit the statement above.
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Which answer option below describes the best way to increase the accuracy of a
confidence interval calculation?
The accuracy of a confidence interval calculation can be increased from 95% to 99%.
Thus, option C is correct.
What is confidence interval?A confidence interval contain a population parameter in a specified proportion of the time, which can be computed using the given confidence level from a limitless level of individual sample.
The proportion of the range consists of the true value of the factor that will be identical to the confidence level.
In most of the confidence interval examples, the confidence level chosen is 95%. and it can be raise up to 99%.
It cannot estimate the plausible values of the unknown parameter of the population.
Two types of confidence interval observed such as accuracy which is defined based on whether the confidence interval contains the true population parameter or not.
Secondly, the precision defined in terms of the width of a confidence interval.
Hence, option C is correct.
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Which trait is totally determined by genes
Answer:
hair color is determined by genetics
Explanation:
Which of the following organelles can be found in plants AND animals?
A. Mitochondria
B. Chloroplasts
C. Vacuole
D. Cell wall
Answer:
Mitochondria can be found in plants and animals
8.Explain how is small intestine designed to absorb digested food.
9. Write two differences between the nutrition in amoeba and human beings.
10. Fungus can be harmful and useful. Give an example showing both of these traits of fungus.
Answer:
10. Fungus are useful as they act as decomposers and decompose the dead things. Fungus are harmful as they can decompose fruits, grains and plants etc.
A student wants to determine how his classmates feel about school. He does a survey away from school so all participants will be willing to answer freely. In several cases, younger siblings of his classmates are present, so he lets them take the survey too. He surveys a total of 50 students. Has he done a well-designed, controlled experiment
Answer:
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Si el sobrino de mi papá tiene un hijo que viene siendo mío?
Answer:
yo creon q sobrino lejan
o
Green house effect is caused by a) Green plants b) Infra red rays c) UV rays d)X-ray
Writing Assignment
One of the main functions of connective tissue is to integrate
organs and organ systems in the body, Discuss how blood
fulfills this role.
Answer:
Major functions of connective tissue include: 1) binding and supporting, 2) protecting, 3) insulating, 4) storing reserve fuel, and 5) transporting substances within the body .Blood integrates organs and organ systems by transporting and exchanging fluid with various organs and organ system to allow them to function and work properly allowing the organism to survive
Why can't we meet all of our protein needs in one meal?
Because most people go for what tastes good rather than what is protein rich, and what tastes good is usually high in fat and carbohydrates, as opposed to proteins.
