How might you account for the prevalence of these two significant misconceptions regarding how science research is done?

your the dumbest b**tch ive ever seen

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.

a time line cause it goes from 685 to 978

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.