How does the theory of evolution disprove the belief that natural selection prepares an organism to adapt to its environment? natural selection occurs before changes in the environment. a population changes in response to a change in the environment. environmental changes can be predicted based on changes in a population. natural selection leads to the survival of the population with the most complex traits.

as a camel goes without food, its hump begins to shrink. its fur prevents the camel from sweating too much.camels store fat in their humps, not water.

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.