Formation of a tetraploid plant from two different diploid parental species of plants is an example of
A. extinction.
B. adaptive radiation.
C. punctuated equilibrium.
D. gradualism.
E. a prezygotic barrier to evolution.
C. punctuated equilibrium.
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What is the adaptive benefit that explains why some simple reflex circuits bypass the brain?
A. The response is slower. B. The response is faster. C. The response is more intense. D. The response is less intense. E. None of the choices is correct; there is a better explanation that is not listed.
An important message from the work of Thomas Malthus that influenced Charles Darwin was
A. animals tended toward "human perfection." B. only a fraction of any population will survive and reproduce. C. population size of humans can only increase linearly. D. inheritance of acquired characteristics. E. none of these. Charles Darwin was influenced by John Ray not Thomas Malthus.
Neuroglial cells
a. metabolically support other neurons. b. form sheaths around neurons and increase the rate of impulse transmission. c. form more than half of the volume of the brain. d. provide physical support. e. do all of these.
The process by which cells of a tumor invade normal tissue and travel to other parts of the body is called ________
Fill in the blank(s) with correct word