In the human stomach, chemical reactions take place in an acidic environment. some of these reactions are catalyzed by enzymes. how would these enzymes most likely function in an environment where the ph was doubled?
(a)the enzymes would interfere with chemical reactions by bonding with the reactants.
(b)the enzymes would not be able to function properly outside of their optimal ph range.
(c)the rate of the reactions that are catalyzed by the enzymes would double.
(d)the rate of the reactions would increase as the ph is increased.

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