Which statement describes the availability of carbon in the ocean and its use by marine processes? a. the ocean is a carbon sink, with carbon being utilized by photosynthesis of phytoplankton. b. the ocean is a carbon sink, with carbon lost due to the transpiration of marine algae. c. he ocean is a carbon source, with carbon being utilized during thermocline formation. d. the ocean is a carbon source, with carbon lost due to the respiration of marine mammals.

Option A

Explanation: The carbon that is found in the oceans are utilized by the phytoplankton found in the oceans.

The carbon sinks in the ocean and then the process of photosynthesis required carbon dioxide and sunlight for the process of the photosynthesis.

The carbon dioxide is utilized by the phytoplankton that is found in the epipelagic zone of the ocean.

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.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."