Which of the following is not a classification of marine organisms? a. benthos c. neritic b. nekton d. plankton select the best answer from the choices provided a b c d

C. Aphotic is a zone where no light penetrates. The others all include organisms in their definitions.  

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"d.) carbon dioxide and hydrogen sulfide"

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.