If you knew a particular amino acid sequence could you figure out the dna for that sequence

Yes if we know an amino acid sequence present in an mRNA we can figure out the DNA for that sequence. As the amino acid sequence are triplet codon present on an mRNA strand so the sequence that is complementary of the triplet codon would be present in the DNA.

For example, one amino acid sequence is AUG so the complementary sequence in the DNA for this amino acid sequence would be TAC. So in place of uracil adenine come in DNA.  

Therefore by complementary base pairing of the amino acid sequence, we can find out the DNA for that sequence.

which are post-impressionist paintings? check all that apply?

explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and color.

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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.