Aaron has a spider plant that produces several plantlets. Aaron puts each plantlet in its own pot and gives the plantlets to several friends. Identify what would cause some of the plantlets to grow better than others, including examples of possible causes. Explain how you know what the cause of variation must be. Enter your answer in the space provided.

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.

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i think the answer is b.