Genetic mutations introduce new gene forms in a population. For instance, the mutation that affects
hemoglobin alters the shape of the red blood cell and makes it sickle-shaped. Which statement
below would explain why the sickle-cell mutation has spread through the gene pool?

A. There is a selective advantage to having Sickle Cell Anemia.

B. This kind of mutation demonstrates a common ancestor.

C. The sickle cell mutation has no benefit.

D. Sickle cell anemia increases the risk of death.

Answer: D on edge

Explanation:

They provide clues about the types of plants that grew in a region at a particular time.

Answer:

I believe it may be a higher surface area to volume ratio facilitates heat loss

Explanation:

Out of the options it makes the most sense being that larger animals keep heat in...

Answer:

Dominant and recessive genes

Explanation:

There is mutation of dominant genes

The biological species concept tells us that organisms belong to the same species if they can breed to produce fertile and viable offspring. Speciation is therefore the development of reproductive isolation between individuals of an original population.

This can occur in 2 different ways:

1. Allopatric speciation. This is when speciation occurs due to some sort of geographic barrier separates a population into 2 groups. These two groups can then undergo genetic divergence, where each group grows increasingly dissimilar genetically due to random mutations and natural selection acting separately in each group, or from processes such as genetic drift. It is important to recognize that the lack of gene flow between these two groups contributes to the genetic divergence of the groups. Genetic divergence can lead to prezygotic and post-zygotic barriers which prevent production of fertile/viable offspring between the 2 groups. Each of these populations now represents a new species, whose gene pools are completely separate from one another.

2. Sympatric speciation. This is when speciation occurs without the presence of any sort of physical/geographical barriers. Truthfully, this is a much less common occurence. However, it is thought that sympatric speciation can occur as a result of strong divergent selection. Sympatric speciation may also occur as a result of a polyploid individual being introduced into a diploid population.

Isolation leads to speciation by preventing gene flow between 2 groups of an original population, allowing genetic differences between the groups to accumulate over time (via natural selection, genetic drift, etc.). Over time, the accumulation of these genetic differences may result in reproductive isolation between the 2 groups, causing these two groups to be committed to separate evolutionary paths.

Answer: So, how might speciation happen?

Explanation:

Speciation describes a situation where a population in a species becomes so different that it can no longer successfully interbreed with other populations of the ‘same’ species.

Answer: The movement of continents changes wind patterns and ocean currents.

hope this helps!

Explanation:

The best statement that describe the effect of tectonic activity on climate change is that the movement of continents changes wind patterns and ocean currents.

Tectonic activities includes volcanoes, mountain building, earthquakes and many more.

Tectonic activities are common in plate boundaries where plates converge, diverge or transform.

As a result of the movement of these continental plate, tectonic activities occurs causing earth climate change

Therefore, the movement of this oceanic or continental plates changes the wind pattern and ocean current.

learn more on tectonic activity here: https://brainly.com/question/12907968

Take a dna test... he will be more confident about it then

Answer:

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Explanation:

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How many types of enzyme does pancreas secrete and name them!

The pancreas consist of exocrine glands that produces enzymes making digestion playing an important role . The enzymes made by the pancreas include :

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Answer: The granum is a part of the chloroplast. The chloroplast contains the chlorophyll pigment and it is necessary for the trapping of the energy present in the sunlight. As a result of this the photolysis of water takes place and hence water is broken down from water molecule to proton and oxygen.

Explanation:

Explanation:

The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body. If your body didn't do it simultaneously, then blood would overflow your lungs.

Answer:

I am pretty sure it is B

Explanation:

I think it is position B, a 3rd Quarter moon, because the moon revolves around Earth about once every 7 days.

Answer:is b

Explanation: i got a 100% on this test

Answer:

1. logistic population growth

2. K = 72

3. I think weeks 2 and weeks 4 through 10

4. 2.78%

5. 12

Answer:

it's a okkkkkk

a

its aaaa

Answer:

I believe it is C.contraction and relaxation of the heart

Explanation:

The flow of individuals in and out of a population introduces new alleles and increases genetic variation within that population. Mutations are changes to an organism's DNA that create diversity within a population by introducing new alleles.

Living Characteristics of Viruses Nonliving Characteristics of Viruses They reproduce at a fantastic rate but only in living host cells. They can mutate. They are acellular that is they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery.

Answer:

Explanation:

cair

padat

gas

Answer:

Autotroph

Explanation:

An autotrophic organism is any organism that is capable of synthesizing its own food either by using sunlight (photosynthesis) as an energy source or chemicals (chemosynthesis). An organism capable of photosynthesis must possess CHLOROPLAST (CHLOROPHYLL), which is responsible for capturing sunlight in the cell and also harbors the photosynthetic process.

According to this question, a newly discovered protist is said to have chloroplasts and vacuoles and moves using a flagellum. Due to the fact that this protist possess CHLOROPLAST organelle, it means it can perform photosynthesis, which is one of the ways an autotrophic organism synthesizes it's food. Hence, the organism is AUTOTROPHIC.

Answer:

Hello There!!

Explanation:

You can get variety of problems and issues from you're nervous system which includes headaches,weakness,fatigue and dizziness and many more.

hope this helps,have a great day!!

~Pinky~

Answer:

A human heart is roughly the size of a large fist.

Explanation:

but the size varies according to an individual's age, health and size. The heart weighs 7 to 15 ounces.

Answer:

Look below - A plane is math related.

Explanation:

a flat surface on which a straight line joining any two points on it would wholly lie.

"the horizontal plane"

synonyms:

flat surface · level surface · the flat · horizontal

Hope this Helps!

Answer:

I Don't Know what your asking but if your trying to figure out what a plane is this might help

1.  a flat surface on which a straight line joining any two points on it would wholly lie.

2. a level of existence, thought, or development.

3. completely level or flat.

4. (of a bird or an airborne object) soar without moving the wings; glide.

Also I don't know why this would be biology related.

Answer:

A volcano

Explanation:

Is a vent or fissure in the Earth's surface through which molten rock and gases are expelled. Molten rock is called magma.

Answer:

Pink. Incomplete dominance is a blending of phenotypes.

Answer:

naturally acquired immunity are effective ways to gain immunity.

Explanation:

there is a saying that eat your food like a medicine otherwise you will neex to ead your medicine as food.so food whuch we obtain from nature have many nutritious values than artificially acquired medicine

This is an inversion.

The section of chromosome has been reversed end to end.

Answer:

I think its B. translocation