Anyone!
which of the following is needed for cellular respiration to occur?
a. oxygen
b. sodium
c. water
d. nitrogen

Which of these organisms have the greatest amount of cell specialized

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone