which type of microscopic organisms thrives in deep water brine pools in the gulf of mexico?

hyper-thermophiles

acidophiles

alkaliphiles

thermophiles

thermophiles

Explanation:

thermophiles exist in the temperature ranging between 50 to 90 degrees, and the temperature of gulf of mexico falls in the same range.

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.