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liraira [26]
3 years ago
9

Guys PLEASEE IF YOU SEE THIS QUESTION PLS TRY HELP ME this is my 3rd time posting the same thing--

Biology
1 answer:
Troyanec [42]3 years ago
7 0

Answer:

Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans. This has shaped our evolution for many years, but reasons why humans choose their mates are hardly understood.

Explanation:

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4 years ago
Biology homework please help
ludmilkaskok [199]

Answer:

muscles

ribs

lungs

bronchioles

alveoli

diffuses

leaves

exchange

Explanation:

Your diaphragm, and <u>muscles</u> between your <u>ribs</u>, make air move in and out of your <u>lungs</u>. It travels through the trachea, bronchi, and <u>bronchioles </u>to <u>alveoli</u>. In the alveoli, oxygen <u>diffuses</u> into the blood and carbon dioxide<u> leaves</u>. This is gas <u>exchange</u>.

<em>Air enters the lungs and leaves it as a result of the relaxation and contraction of the diaphragm and the muscles between the ribs. When both the muscles and the diaphragm relax, air enters from the trachea and travels through the bronchi and the bronchioles to the alveoli, where the oxygen in the air diffuses into the blood and carbon dioxide diffuse in the opposite direction. The entire process is known as gas exchange.</em>

7 0
3 years ago
What type of normal human cell contains 22 autosomes and a y chromosome? what type of normal human cell contains 22 autosomes an
lbvjy [14]
Humans have 22 of these chromosome pairs, called autosomes. Humans have an additional pair of sex chromosomes for a total of 46 chromosomes. The sex chromosomes are referred to as X and Y, and their combination determines a person's sex. Human females have two XX chromosomes while males<span> possess an XY pairing.
</span>
4 0
3 years ago
The ability to grow differently colored fur based on the season provides Arctic foxes with a selective advantage. What do you th
SCORPION-xisa [38]

Answer:

This is known as Phenotypic plasticity, the artic fox has the advantage of being able able to hunt rodents, birds and fish

Explanation:

Phenotypic plasticity can be explained as the changes in the behavior, morphology, physiology of an organism such as the artic fox in response to their unique habitat. It tells us how the artic fox is able to cope with the variations in it's environment.

Their natural hues helps them to blend into snow and ice since it is white. When there's a change in season, their fur or coat also changes as well to a brown or grey color that gives it cover when it is among rocks and plants.

These colorings gives them an advantage and help them to hunt rodents, birds and fishes.

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3 years ago
The main reason for using solar sails to propel spacecraft is to increase the
Paraphin [41]
Solar sails are used to increase speed.
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