Which phrases describe the prime meridian? check all that apply.

is a line of longitude
runs parallel to the equator
connects the north and south poles
is labeled at 90 degrees on a world map
divides the western and eastern hemispheres

1,3,5

Explanation:

i got 100 on the test

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.