If a sperm cell of an animal has 13 chromosomes, how many chromosomes would be in a skin cell?

46 chromosomes

Explanation:

In all the somatic cells of the body 23 pairs of chromosomes are present. They mean 46 chromosomes in total. In a skin cell of humans, 46 chromosomes are present(human diploid number).

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.

answer; the above statement is (true);