Can someone help me “You have to be precise and patient to add the exact amount of reagent needed for
neutralization. How are you going to add the reagent and how are you going to determine the
necessary final volume that has to be added?”

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.

cells spend most of their time in interphase