Use the vision to answer the question. A diagram has three boxes in a row. In the first box is a drawing of grass. An arrow points to the right to the next box which is blank. Another arrow points to the right from the second to the third box. In the third box is a drawing of a bobcat.

Which organism would best fit in the middle blank box to complete this food chain?

A.
caterpillar

B.
rabbit

C.
hawk

D.
cougar

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.