Connect to Technology One of the revolutions in molecular biology in the past decade was the use of Green Fluorescent Protein (GFP) to make it easier to visually identify specific components inside living cells. GFP can be seen under a microscope because it fluoresces, or glows, when certain types of light shine upon it. Scientists can instruct a cell to link GFP to a specific protein as it is being created and then follow the protein under a microscope. Explain why this might be useful.

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; /// i believe the correct answer is (reactants);

the correct answer is:

a population changes in response to a change in the environment.