Which of the following statements best summarizes natural selection?
A) Organisms evolve in order to become better adapted to the environment.
B) Individuals who are most fit will survive.
C) Traits that promote survival and reproduction become more frequent in species from one generation to the next.
D) Organisms change in order to become adapted to new environments.
C
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How does an electron transport chain work in cells as a controlled energy release?
What will be an ideal response?
A. Argue in support of using adult tissue stem cells rather than embryonic stem cells. B. Argue against using adult stem cells rather than embryonic stem cells.
What will be an ideal response?
Which of these diseases involves the destruction of the myelin sheath on certain neurons within the brain and spinal cord?
A) Alzheimer's disease B) Parkinson's disease C) depression D) multiple sclerosis
For individuals planning a trip to another country, such as Vietnam, which organization is the best source for information on which vaccines might be necessary?
a. Centers for Disease Control and Prevention b. National Institutes of Health c. National Safety Council d. Tourist Travel Bureau