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LenKa [72]
3 years ago
13

A change in the frequency of alleles from one generation to the next is the definition of:

Biology
1 answer:
posledela3 years ago
5 0
From a modern genetic perspective, this is defined as evolution.
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You discover a new type of gland associated with the skin. Chemical analysis of the product shows a secretion has a pH of 4, con
vagabundo [1.1K]
<h2>A) option is correct </h2>

Explanation:

Skin has two types of sweat glands: eccrine and apocrine

Eccrine glands occur over most of the body and open directly onto the surface of skin whereas apocrine glands open into the hair follicle, leading to the surface of the skin and develop in areas abundant in hair follicles, such as on scalp, armpits and groin

The eccrine gland is controlled by the sympathetic nervous system and regulates body temperature

In some animals, when internal temperature rises the eccrine glands secrete water to the skin surface, where heat is removed by evaporation

Eccrine glands when active are considered major thermoregulatory devices

Smaller mammals, such as rodents, cannot endure dehydration and hence possess no eccrine glands at all

3 0
3 years ago
Identify the respiration system of amoeba​
Arturiano [62]

Explanation:

In amoeba respiration takes place through its cell membrane also called the plasma membrane. Amoeba gets oxygen gas dissolved in surrounding water through its plasma membrane by the process of diffusion. The oxygen gas diffused inside the body is used up by the amoeba. In the body, the oxygen gas absorbed is used to break down the complex food material into simple molecules. During these metabolic reactions in the body of amoeba, the oxygen gas is converted into carbon dioxide gas. The carbon dioxide gas is also liberated in the surrounding water through the same process of diffusion.

Since amoeba needs oxygen for respiration, the type of respiration is aerobic respiration.

8 0
3 years ago
Your friend is a pioneer in ES cell research. In her research, she uses an ES cell line that originated from an inbred strain of
Nezavi [6.7K]

Answer:

Explanation:

a)Organ transplantation requires that the donor organism and recipient be genetically close so that the graft or transplant will not be attacked by the immune system of the recipient leading to rejection and damage. Squeaky is likely to be made up of a different genetic configuration compared to laboratory inbred FG426 mouse

b) ips (induced pluripotent stem cell) on the other hand can benefit squeaky since the cells are somatic cells such as B cells, Keratinocytes, neuronal progenitors cells, kidney and muscles gotten from the donor that are reprogrammed by reactivating silent genes through fusing of another different cell such as ES (embryonic stem cell) and introduction of some transcriptional factors such oct4, sox2,kf4, and k-myc leading to transcriptional activity and DNA methylation.  This induced pluripotent stem cells can be grown into organ that can be transplanted to the recipient who was initially the donor of the reprogrammed somatic cells. Because it is from the host, the transplanted organ is not likely to trigger immune response compare to those grown from ES from other bred.

4 0
3 years ago
¿Por qué las células nerviosas no se comportan como las células del corazón?​
vredina [299]

I have no idea what that means but the answer is b

7 0
3 years ago
Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen
natita [175]
<span>Valence is defined as number of electrons that are present in the outermost orbital. Oxygen is in the 16th column of the periodic table and the total number of valance electrons is determined by units place digit of the column position which is 6 for oxygen. The outermost orbital is the high energy level and there are two in that orbit. So the valance is +2.</span>
4 0
3 years ago
Read 2 more answers
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