What are some ecological events that would impact cellular respiration? Ex. A drought would effect photosynthesis.

In a relatively small iguana population the allelic frequency is tracked for three generations. webbing is a recessive allele; no webbing is the dominant allele. during one very rainy spring and summer, a flood washes all the iguana without webbed feet out to sea. by the fall, and three generations later, you have the gene pool seen here.

In which specialized organ of the plant would these cells most likely be found

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?