The orbital radius of uranus is 19.22 au. what is this distance in kilometers? (one au is about 150 million kilometers.)

2,883 million kilometers

If one AU is 150 million, then you haft to multiply 19.22 (the amount of Astronomical Units you have) with 150,000,000 (150 million).

19.22 x 150,000,000 = 2,883,000,000 km

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.

a chair, a bed, and a toothbrush

explanation: