In vascular plants, specialized root hairs on the roots of the plant are responsible for taking up water and nutrients. the water taken up by the roots of the plant can then be transported to the rest of the plant through the plant's a. chloroplasts b. phloem tissue c. mitochondria d. xylem tissue

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.