Which of the following best explains why herbivorous organisms are more energetically efficient than those that consume meat?
a. herbivorous organisms are slower and therefore burn fewer calories
b. herbivorous organisms obtain their energy directly from the sun
c. herbivorous organisms are at the top of the food chain
d. herbivorous organisms need to consume less food than meat eaters to obtain the same amount of energy
e. herbivorous organisms are at the bottom of the food chain
Answer: e. herbivorous organisms are at the bottom of the food chain
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The polypeptide-making organelles, which consist of protein combined with RNA, are called
A. lysosomes. B. centrosomes. C. ribosomes. D. Golgi bodies. E. mitochondria.
The crab industry needs female crabs for growing more crabs. What bacterium might be used to ensure development of female crabs and shrimp?
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Why can scratching or chipping the seed coat speed up the germination of hard-coated seeds like alfalfa?
A. The mechanical stress activates hydrolytic enzymes. B. Carbon dioxide can enter the seed and stimulate photosynthesis. C. Water and oxygen can enter the seed to reach the embryo more quickly. D. Damage to the seed coat triggers the aleurone layer to release amylase. E. Bacteria or fungi can enter the seed and release growth factors.