A deleterious recessive allele is one that can be harmful when it is found in its homgous condition, resulting in a poorly fit phenotype. An example of this is the allelefor sickle cell, which results in the condition known as sickle cell anemia when both recessive alleles are inherited. owever, in regions of Afriche proportion of the sickle cell allele is igher than expected, with as much as 15% of the alleles in the population being the recessive, deleteriou rsion. In the African population, there is also a high prevalence of malaria, a disease caused by the parasitic infestation of a plasmodium protozoan in the blood of humans. The recessive allele for sickle cell has been maintained over many generations. Evaluate the graph above and select the claim that supports the high frequency of the recessive allele in these African populations.
A)There is a selective advantage to the aa genotype, as the presence of sickle cell provides a greater fitness in an environment where malaria is common.
B)There is a selective pressure against the aa genotype, but the presence of malaria induces new mutations which generates more alleles within the population.
C)There is directional selection towards the Aa genotype, since aa is often a lethal condition. Non-random mating tends to maintain the recessive allele in the population.
D)There is a selective advantage to the heterozygous (Aa) condition as there is selective pressure against both the AA and aa genotypes. This maintains the recessive allele in the population.

Answer:

importance of biogeochemical cycles through the ecosystem the cycle move the essitinal elements for life to sustain they are vitil as the recycle Store them to regulate the vital elements through the physical facets

One of the parents must be heterozygous while the other must be homzygous.

Huntington's disease is an autosomal dominant disease. In other words, only one allele (dominant) is required for the disease to manifest.

In order to produce a child with a 50% chance of being homzygous for the disease, one of the parents must be heterozygous for the disease, while the other must be homzygous.

Assuming the allele for the disease is A(a).

                  AA    x    Aa

                AA   Aa   AA   Aa

Probability of AA = 2/4 or 50%

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The correct options to fill in the gaps are:

NAD+ serves as an electron acceptor in glycolysis. It accepts two electrons to become reduced to NADH + H+.

NAD+ is a limiting factor in glycolysis. In the absence of ADP, the conversion of NADH to NAD+ via the electron transport chain is prevented from happening.

In eukaryotes, the hydrogen atoms of the molecules mentioned in are transferred to certain organic molecules in one of two methods: alcohol fermentation as can occur in yeast and lactic acid fermentation as can occur in human cells. In the process mentioned in, the hydrogen atoms are passed to acetaldehyde, which is then converted to a molecule of ethanol. During this a molecule of NADH is oxidized to a molecule of NAD+, which allows glycolysis to continue on.

In conclusion, NAD+ concentration is limiting to glycolysis.

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Answer:

-Linnaean Classification System: Classification of the Human Species.

-Biological scientists have worked to classify earth's organisms in a manner that would help us understand how both the present and the extinct species relate to each other.

The hypothesis is false. Higher magnifications only increase the details of organelles, not increase the number.

At lower magnifications, cells on slides are brought into focus and the organelles are seen but not in detail.

At higher magnifications, the organelles of cells appear bigger and can be studied in more detail compared to at lower magnifications.

Thus, higher magnifications do not increase the number of organelles that will be seen, but their details.

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There are "256" different genetic combinations that a gamete may make by independent assortment.

What is meant by independent assortment?

Homologous chromosomes are allocated at random to daughter cells during meiosis, while distinct chromosomes segregate apart from one another. The term for this is independent assortment. It produces gametes with distinctive chromosomal arrangements.

Calculation:

Here, the number of chromosomal pairs in the ant = 4.

Every pair of chromosomes is going to be divided into a single gamete during the gametogenesis process.

Therefore, there are 4 unpaired chromosomes in all.

Now that the gametes lack paired chromosomes, they are haploid.

Now, a gamete would only contain one of the single chromosome pairs.

Let's assume that the chromosomal gene in the cell is heterozygous.

There are thus going to be options = 2.

Therefore, their likelihood will provide possibilities =2 x 2= 4.

Then there would be 4⁴ chromosomes = 256 chromosomes.

Therefore it is concluded that the genetic possibilities from the independent assortment of a gamete are "256".

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Some examples of equivalent fractions include:

This refers to the type of fractions that has different denominators and numerators but have the same value when broken down to the smallest terms.

Furthermore, some more examples of equivalent fractions are:

You should also note that equivalent fractions can be found by multiplying the numerator and the denominator by the same number and you would see if your fraction is an equivalent fraction or not.

Please note that your question is unclear, so I gave you a general overview to help you get a better understanding of the concept of equivalent fractions.

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Answer:

While nonhuman primates don't have obvious cultural traditions the same way humans do, such as variation in their clothing or adding extra spice to their food, primatologists have nonetheless identified behavioral practices that vary between communities and which are transmitted through social learning

Explanation:

hope it helps you and give me a brainliest

The function of this model is option A: that is it helps us to understand the details of  scientific concept.

There are known to be 7 planets and they all are known to revolve round the Sun, they are:

Note that Scientific models are tools that are often used to explain and tell the behavior of real objects or systems and also they functions or they are used in a a lot of scientific disciplines, such as physics and chemistry, etc.

Therefore, The function of this model is option A: that is it helps us to understand the details of  scientific concept.

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Answer:

In order to facilitate reproduction, independent of cell division, both of chloroplasts and mitochondria have DNA and ribosomes.

Answer:

cervix

Explanation:

Answer:

because they are vascular plants.

Explanation:

I looked it up

Answer:EPA

Under SDWA, EPA sets standards for drinking water quality and oversees the states, localities, and water suppliers who implement those standards.

Explanation:

Answer:

The best treatment for specific phobias is a form of psychotherapy called exposure therapy. Sometimes your doctor may also recommend other therapies or medication. Understanding the cause of a phobia is actually less important than focusing on how to treat the avoidance behavior that has developed over time

Explanation:

The disorder that most fits the patient's symptoms is a bipolar disorder. The correct option is C.

Bipolar people have episodes of severe depression as well as episodes of mania, which include overwhelming joy, excitement, or happiness, enormous energy, a reduced need for sleep, and reduced inhibitions. Bipolar disorder is a highly individual experience.

The symptoms of bipolar disorder are frequently triggered by a stressful circumstance or situation. A relationship breakdown is an example of a stressful trigger. Abuse can be physical, intimate, or emotional.

Bipolar disorder is characterized by extreme mood swings that are unpredictable and frequently disrupt daily functioning.

According to Dr. Gonzelez's psychiatric patient, she stayed up for three days last week writing because she felt incredibly energetic and creative.

She arrived at her therapy session exhausted, having not showered or changed clothes in several days; the disorder that best fits the patient's symptoms is a bipolar disorder.

Thus, the correct option is C.

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Answer:

(b) It is a complete chromosome

Most flowers are bright in color because it is attractive to pollinators.

An adaptation is any phenotypic trait that confers an evolutionary advantage to an individual.

Most flowers are bright in color because it is attractive to pollinators, which is required to transport pollen to other flowers and thus increase the genetic variation in the plant population.

In conclusion, flowers are bright in color to attract pollinators.

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Answer is superior vena cava

Reason

See attached diagram

Answer:

simple there is no oxygen

Label A - Nucleus

Label B - Cytoplasm

Label C - Ribosome

Label D - DNA

The picture is that of an animal cell.

The parts labeled A, B, C, and D respectively are the nucleus, the cytoplasm, the ribosome, and the cell's DNA.

The nucleus is located centrally and controls the activities of the cell. It is a double membrane organelle that house the genome of the cell. Materials are able to move in and out of the nucleus while the nuclear membrane act as a selectively permeable membrane.

The cytoplasm represents the inner content of the cell. It consists of the inner organelles and the liquid content, otherwise known as the cytosol.

The ribosome is a small spherical organelle that functions in the synthesis of proteins. Some ribosomes lie freely within the cytoplasm while others are found attached to another organelle known as the endoplasmic reticulum.

The DNA is located inside the nucleus. It is the molecule responsible for the transfer of traits from parents to offspring.

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Answer: its b i just got done with it

Explanation:

In the image, the structure indicated is the plant cell wall, which is responsible for protection and homeostasis.

Cell wall is a cell structure that differentiates animal cells. Its main purpose is to avoid the plasma membrane of cells, skin function and resistance to physical resistance and which includes the plasma membrane of cells.

With this information, we can conclude that The cell wall is a very resistant structure composed of microfibrils of the polysaccharide called cellulose. It surrounds the plasma membrane and has pores in its structure that function as filters in relation to the external environment.

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The correct option is (c). We are supposed to be located in the north pole. This is due to Arctic circle phenomenon.

What is Arctic circle phenomenon?

Arctic circle phenomenon means that the sun does not set above this latitude during the summer months. Arctic circle is an imaginary line. North pole of the Arctic circle faces the periods of constant sunshine mainly during the summer months of june, july and august. This occurs due to the fact that Earth is tilted at its axis by 23 degress and during its rotation in summer months it's North pole gets aligned towards our star. For example, northmost parts of Norway.

That's why the Sun did not set during an entire 24 hour period of time during summer months of june,july and august.

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Answer: Clade

Explanation:

The type of trauma that are indicated are both complex and  chronic traumas.

Trauma can be defined as the serious event that can negatively affect the emotional, physical and mental being of an individual.

From the excerpt given, the two types of trauma represented are:

The nature of the wound indicates that the cause would be of direct force from blows.

The positioning of the perpetrator and the victim according to the order of the trauma is that both of them where involved in a fight.

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Answer:

energy-rich molecule: ATP

use: it is hydrolyzed by cells to produce energy. Under standard conditions the removal of a phosphate group from ATP to produce ADP + Pi yields 30.6KJmol‐¹.

organelle: mitochondria

Proteases, Lipases and Amylases are the different types of enzyme in the human body.

There are three main types of digestive enzymes in the human body such as Proteases, Lipases and Amylases.

Proteases is a type of enzyme that break down protein into small peptides and amino acids.

Lipases is an enzyme that break down fat into fatty acids plus a glycerol molecule.

Amylases is an enzyme that break down carbohydrates like starch into simple sugars.

So we can conclude that Proteases, Lipases and Amylases are the different types of enzyme in the human body.

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The contraction will increase. The first option is the correct option.

It is an organ that helps to excrete excess water from the body of some protozoans such as paramecium.

The more excess water present in the organism, the more the contractile vacuole contracts to get rid of the water.

With distilled water, more water will enter the cell and this excess water will need to be gotten rid of. Thus, the contraction rate will increase.

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Answer:

A

Explanation:

Answer:

Turner Syndrome

Explanation:

When someone only inherits only the X chromosome, their karyotype symbol for that will be XO. Symptoms of Turner Syndrome include "short height, failure of the ovaries to develop and heart defects."

According to the research, decomposers are organisms responsible for returning nutrients back to the soil.

They are different organisms such as bacteria and fungi whose main function is to break down the waste of plants and animals.

With the decomposition process where organic matter is processed into inorganic, simple elements (nutrients) reappear in the soil that are used as food by plants.

Therefore, we can conclude that according to the research, decomposers are organisms responsible for returning nutrients back to the soil.

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