What is the reason for agricultural run-off to kill fish in coastal areas that are potentially hundreds of miles from the fields? a. the fertilizer traps sediments which ultimately clog the gills of the fish. b. the pesticides applied to the crops are selectively toxic to marine fish. c. excess fertilizer can cause dinoflagellate blooms which produce toxins. d. the freshwater from the rivers dilutes the salt water and kills the fish.

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Which describes the habitat of a frog?

When a plant is genetically identical to its parent plant what is this called