Plz help asap! How do membrane proteins contribute to the membrane potential? The sodium potassium pump results in a net positive charge that stores energy as voltage.
The proton pump results in the repulsion of cations to the negative intracellular membrane.
The attraction of anions inside of the cell contributes to the positive extracellular environment.
Aquaporins result in a combination of positive charges intracellularly and negative charges extracellularly.

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.

idk im sorry.