Gas stored in a tank at 273K has a pressure of 388K PA the safe limit for the pressure is 825 kPA at what temperature will the gas reach it this pressure

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; both surfaces of the membrane are nonpermeable

not always but somethings can be reproduced in a laboratory.

what about it?

is this a ?