Aging effects all of the body's cells; and therefore, the basic building blocks of tissues. as your body ages, many tissues
a) gain mass resulting in atrophy.
b) lose mass resulting in atrophy.
c) gain mass resulting in hypertrophy.
d) lose mass resulting in hypertrophy.

The answer would be B) Lose mass resulting in atrophy

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.

by drinking easy

very easy