Correct answer: C). Autotrophs fix carbon and produce oxygen for heterotrophs, which produce carbon dioxide for autotrophs.
Autotrophs are those organisms, that are known to make their own food in the presence of sunlight. Example- Plants
Heterotrophs are those organisms that use the food that comes from the other organism in the form of fats, proteins, and carbohydrates. These organisms that feed on other are called as heterotrophs.
Example: Carnivores, omnivores etc
It uses a little oxygen - it uses none
Vestigial means that it is no longer a crucial component, the answer is appendix.
Answer:
I got you my mans
Explanation:
Identify and Describe
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Compare under a microscope