How is the process of stratigraphic correlation carried out? a. by dating through the use of a chronometric method b. by matching stratigraphy from known sites only c. by matching strata by chemical composition and color from several sites across distances d. by correlating stratigraphic markers found at different depths in one location?

The process of matching up strata from a lot sites through the physical, other properties and analysis of chemical. While biostratigraphic dating a relative dating method that uses the associations of fossils in strata to analyze each layer's age approximately. C. by matching color from several sites across distances strata by chemical composition and is the answer.  

The correct answer is: C, by matching strata by chemical composition and color from several sites across distances.

All through by means of matching the color into wide range of sites just as across the distances into the strata by support of chemical composition.

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.