The answer is D, Rough endoplasmic reticulum.
"A. Mutations" is a factor in how a species can change over time. Natural selection selects these random mutations for survival based on how fit they make their host to the environment.
Bird
Condensation
The bird flys through a cloud and the cloud is condensation
The electron transport chain<span> occurs across the inner membrane of the </span>mitochondria<span>.
Hope this helped!!! :)
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