Which of the following is true of metabolism in its entirety in all organisms?
A) Metabolism depends on a constant supply of energy from food.
B) Metabolism uses all of an organism's resources.
C) Metabolism consists of all the energy transformation reactions in an organism.
D) Metabolism manages the increase of entropy in an organism.
C
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What makes sexually reproduced offspring genetically different from their parents?
A) genetic recombination during meiosis B) genetic recombination during mitosis C) crossing over during mitosis D) Sexual reproduction does not produce genetically different offspring.
Muscle cells are stimulated by acetylcholine released from the terminals of
A. transverse tubules. B. motor cell axons. C. sensory cell axons. D. motor cell dendrites. E. sensory cell dendrites.
Answer the following statements true (T) or false (F)
1. Plants are unable to use nitrogen gas directly. 2. Sunlight can actually be so intense that photosynthesis can be stopped. 3. Nitrogen is one of the most abundantly applied fertilizers worldwide. 4. When body temperature drops below normal, a person starts shivering uncontrollably. This is an example of negative feedback.
Carbon first becomes part of a living thing as a result of
A. nitrogen-fixing bacteria. B. decomposer organisms. C. photosynthesis. D. aerobic respiration.