Ecosystem diagrams help us visualize the flow of ___________.
A. matter and energy
B. rivers and streams
C. seasonal change
D. happiness
E. goods and services
Answer: A. matter and energy
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Proteins that are involved in the regulation of the cell cycle and that show fluctuations in concentration during the cell cycle are called _____
A) ATPases B) kinetochores C) kinases D) estrogen receptors E) cyclins
Botulinum antitoxin produced in a horse and given to a human suffering from botulism food poisoning is an example of
A. naturally acquired passive immunity. B. naturally acquired active immunity. C. artificially acquired passive immunity. D. artificially acquired active immunity.
Impulses are received by nerve cells through
a. an axon. b. any process that is long enough to reach the receptor. c. numerous dendrites. d. the intervention of the neuroglia. e. chondrocytes.
If C is dominant to c, what fraction of offspring will be homozygous dominant when two heterozygous parents are
crossed? a. 0/4 b. 1/4 c. 2/4 d. 3/4 e. 4/4