When a gene is duplicated:
a. it may be lost through mutation.
b. it may become nonfunctional through mutation.
c. it may gain a new activity.
d. All of the above.
e. None of the above.
D
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When a molecule absorbs a photon, one of its electrons is raised to the ________ state
A) energetic B) quantum C) positive D) excited
The mother of a child scheduled to receive a thymectomy (removal of the thymus gland) asks you whether there will be any side effects from the removal of the gland. Which two organ systems would you mention in your explanation?
A population pyramid:
a. reflects the number of individuals in various age groups in a population. b. predicts survival and mortality rates for an individual at a given age. c. directly predicts future age distributions of the population. d. shows the current birth and death rates of a population.
The Calvin Cycle takes place in the:
A. home of the thylakoid B. chloroplast stroma C. thylakoid stroma D. cytoplasm E. mitochondria