Photoautotrophs
A) make sugar by using organic raw materials.
B) produce organic molecules from inorganic molecules.
C) eat other organisms that use light energy to make food molecules.
D) include only the green plants.
Answer: B
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The average number of children born to a woman during her lifetime is known as:
a. age structure. b. replacement-level fertility. c. natality. d. total fertility rate. e. infant mortality rate
When biologists use an optimality model to predict foraging behavior, they assume that animals behave in a way that
a. maximizes energy gained over time. b. maximizes reproductive success over a lifetime. c. maximizes immediate reproductive success. d. maximizes the probability of survival. e. I don't know the answer.
Which is not a stimulus that exteroceptors can sense?
A. Muscle tension B. Sound C. Gravity D. Smell E. Light
What are the narrow, tapering cells found in the xylem tubes of drought-adapted plant species?
What will be an ideal response?