The Mexican horn shark has
fins and spines b/c it feeds on...?

Explanation:

They feed on benthic invertebrates, especially sea urchins, crabs and probably abalone, also fishes.

The Mexican Horn shark usually feeds on crabs and demersal fishes including midshipman. Conservation: The Mexican Horn Shark is not of commercial value but is taken as bycatch in bottom gillnets and shrimp trawling operations in the Gulf of California and Mexican coastal lagoons.

Explanation:

i think it is dna, i'm not totally sure but i think it might be.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.