Dna a.)contains hereditary information b.)is found inside the nucleus c.)is made of four chemical bases d.)all of the above

Option D

All of the options are Correct

DNA is composed of four sub units namely A, G, T or U and C. DNA is also responsible for carrying the genetic information through the specialized codon pairing of these sub units. DNA is a polymer which is found on the chromosomes which swim in the nucleus with in the cell.

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.