Through aquatic succession, a clear lake may eventually become a meadow barren rock an ocean an aquifer

The correct answer is "meadow".

Explanation:

Aquatic succession is the geological process given when a glacial lake dries up until the point that it practically disappears. A clear lake that go through aquatic succession may eventually become a meadow. The whole process of aquatic succession would be, the glacial lake drying up to a clear lake and the clear lake eventually becoming a meadow.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

it depends on how much it could carry.