Does anyone need help with something dealing with space science???

yah, what's is the effect of atmosphere of a planet with the escape velocity of that planet, and is the black hole like a portal, or?!

I think I am good thank you for asking?

Explanation:

c. genetic engineering

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.