Only the strongest animals survive
Answer:
The answer is the letter c the third one
selection favors organisms which are well adapted to the environment.
(according to Darwin's theory)
Answer:
Prokaryotes play several roles in the nitrogen cycle. Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. ... Denitrifying bacteria converts nitrates back to nitrogen gas.
Explanation:
The correct answer is:
A. A group of related parts that work together to achieve a desired result.
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