Stating the consequences of drug use is a resistance strategy that can involve
a. explaining why the drug is harmful for you
b. explaining possible negative side effects of the drug
c. explaining how your life might negatively change if you began taking the drug
d. all of the above

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.