<h2>Answer:</h2>
D. haploid
<h2>Explanation:</h2>
Gamete is a mature haploid male or female germ cell which is able to unite with another cell of the opposite sex in sexual reproduction to form a zygote during the process of meiosis. Male gametes are called sperms and female gametes are called eggs.
Increasing the number of capillaries associated with alveoli would be expected to increase carbon dioxide being carried to alveoli.
Alveoli are the very small air sacs at the end of the bronchioles. Each alveolus is cup-shaped with thin walls, and It is surrounded by networks of blood vessels which are called as capillaries that also have very thin walls. The oxygen we breathe gets into the blood through the alveoli and capillaries. The Red blood cells travel through the capillaries. Alveoli's walls share a membrane with the capillaries. Oxygen and carbon dioxide get in and move freely between the human respiratory system and the bloodstream.
Oxygen molecules are attached to red blood cells, which travel back to the heart, and at the same time, carbon dioxide molecules in the alveoli get out of the body.
Learn more about alveoli here
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The main organelle involved in respiration is the--Mitochondria.
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