Which of the following choices is an example of an independent system A: a human who needs food and water to survive

B: a plant that needs sunlight to make energy

C:a factory that recycles plastic bottles into reusable tote bags.

D:None of these choices are correct.
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Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?

Which direction does the energy flow in this energy pyramid ?

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.