Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. of the remaining energy, some is used for the organism's life processes, and the rest is . .

i think the miocene epoch spans the time from 23 million to 12 million years ago.

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.

answer; the above answer to the above statement is (true)