Alli is having a problem with her hair and nails becoming fragile and breaking easily. She went to the store to buy vitamins to help her, but is unsure of what type of
supplement she needs.
Which macromolecule should Alli look for on the vitamin labels?

vitamin c

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.