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lina2011 [118]
3 years ago
13

24. What is the purpose of natural selection?

Biology
2 answers:
mezya [45]3 years ago
5 0
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations
velikii [3]3 years ago
3 0

Answer: To get rid of the week and let their kids not be weak.

Explanation:

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Which membranes line the passageways that open to the exterior of the body, including those of the respiratory, digestive, repro
jenyasd209 [6]

Mucous membranes line the passageways that open to the exterior of the body, including those of the respiratory, digestive, reproductive, and urinary systems in the body.

A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue.

It is mostly of endodermal origin and is continuous with the skin at body openings such as the eyes, eyelids, ears, inside the nose, inside the mouth, lips, the genital areas, the urethral opening and the anus. Some mucous membranes secrete mucus, a thick protective fluid. The function of the membrane is to stop pathogens and dirt from entering the body and to prevent bodily tissues from becoming dehydrated.

One of its functions is to keep the tissue moist (for example in the respiratory tract, including the mouth and nose).  It also plays a role in absorbing and transforming nutrients.  

Mucous membranes also protect the body from itself. For instance, mucosa in the stomach protects it from stomach acid and mucosa lining the bladder protects the underlying tissue from urine. In the uterus, the mucous membrane is called the endometrium, and it swells each month and is then eliminated during menstruation.

Learn more about Mucous membranes here : brainly.com/question/26244782

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8 0
1 year ago
Describe how rock that is exposed to the elements: air, water, changing temperatures, certain
antoniya [11.8K]

Answer:

because its energy reflects its changing

Explanation:

5 0
3 years ago
In addition to its role in bone development and maintenance, calcium is also required for
AlladinOne [14]
<span>1. Smooth functioning of nerves-Calcium is key in helping nerves transmit messages across cells in the body. 2. Clotting of blood-Calcium helps in the clotting function of blood 3. Aids the contraction of muscles-Our muscles make use of calcium to aid them in contracting during the course of normal muscle functions.</span>
3 0
3 years ago
The levels of carbon are expected to____ of our oceans
andreev551 [17]

Answer:

The levels of carbon are expected to_increase___ of our oceans

Explanation:

As humans activities increase the levels of carbon dioxide in the atmosphere so do the ocean levels of carbon increase. This is because of the fact that gases from the atmosphere dissolve in and out of the oceans at the interphase between the atmosphere and hydrosphere.

The more carbon dioxide in the atmosphere, the more the gas dissolves in the oceans. This is why more corals are bleaching around the world. The dissolved carbon dioxide is lowering the pH of the ocean waters because of the formation of more carbonic acid.

Learn More:

For more on increased levels of carbon dioxide in oceans check out;

brainly.com/question/3442060

brainly.com/question/4545564

brainly.com/question/12983657

brainly.com/question/2313052

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4 0
3 years ago
If the ocean water is allowed to evaporate, a white powder is left behind The material in the powder is not found in such large
melomori [17]

Answer:

Salt

Explanation:

Ocean water has salt in it unlike lakes and rivers

4 0
2 years ago
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