Animals convert the energy in food into a form their body can use by the process of A. cellular respiration B. chemosynthesis C. photosynthesis D. carbon fixation

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Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.