Which of the following are likely impacts of overfishing?

-The populations of higher order consumers decrease

-Oxygen dissolved in sea water decreases

-The biodiversity of the ecosystem decreases

-Large numbers of producers are removed from the
ecosystem

-The populations of higher order consumers decrease

Explanation:

More fish are being killed meaning less food for consumers which means that tertiary consumers will be left with less food. One small problem can have a devastating effect.

"a scientist studying a whale and its surroundings would need to understand the structure of atoms in case something was negatively affecting the whale or its surroundings."

explanation:

this was from the link provided:

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.