S
ome people believe that humans have always existed as the species we see today. darwin created the theory of evolution. which observation bolsters the theory of evolution?
a) humans have very diverse traits today.
b) there appear to be missing links in the evolutionary chain.
c) life on earth has been found to date back billions of years.
d) dna found in older primate fossils resemble those of humans today.

d yall

Explanation:

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