Which of the following is not true concerning the elements of a quality life?
a. it might include financial and physical security.
b. they are considered stable over a lifetime.
c. it is highly individualized.
d. it depends upon personal environment and relationships
not c

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.

the glands which are associated with each description is given below: