This is increasing concentration of a substance, like a toxin such as ddt, in the tissues of organisms at successively higher levels in a food chain.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse

and after water is usually warmed by the sun the water temperature raises and then evaporates .