3o points(more than one answer)

the dumping of garbage caused the population of crabs in an area to drop from 2,000 to 500. crabs eat algae and are preyed on by larger fish. how will the crab’s population change affect these two species?

a. food and space will be equally distributed among the three species.
b. the population of predatory fishes will change.
c. the biodiversity of the ecosystem will decrease.
d. the algal population will increase.
e. the algal population will decrease.

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.