Which statement is the best decription of how blood circulates through the body? A. The circulatory system pushes blood upward throughout the body
by using gravity

B. The heart contracts and relaxes causing a force to push the blood
throughout the body.

C. The respiratory system pulls the blood inward when inhaling and
pushes it outward when exhailing.

D. The blood circulates throughout the body by gravity only.

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.

cuz he is really really short, assuming an unorthodox and inherently unlucky configuration of elevator buttons…

explanation:

silty loam

hope this