Please help! A lot of points

1. Some amphibians and crayfish can withstand periods of dryness by burying themselves in mud. In which pond would they survive best?

Pond A, b, c or d?

2. Some mussels require a sandy bottom in order to maintain an upright position. In which pone will they die out?

-Pond a, b, c or d?

3. Which pond would most the most likely to lead terrestrial succession?

-Pond a, b, c, or d?

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

What are simmilarities and differences between anaerobic respiration in animal and yeast cells? would prefer to get simmilarities as i already got some differences. you!