The carbon atoms in the cellulose of a wood log originally came from _____ absorbed by the plant.
A. glucose
B. carbon dioxide
C. nutrients in the soil
D. water
E. oxygen
B. carbon dioxide
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The proofreading of the DNA occurs in the _________
A. 5' to 3' direction B. 3' to 5' direction C. Both directions
In animals with a brain, the two major divisions of the nervous system are the ____
a. autonomic and peripheral nervous systems b. central and peripheral nervous systems c. brain and spinal cord d. nerves from the brain and the peripheral nervous system e. cranial and spinal nerves
It will take approximately ____ years for
Carbon 14 to be reduced into half of the original substance.
a. 16,000 b. 11,200 c. 8,200 d. 5,370 e. 300
Blood typing is often used as evidence in paternity cases in court. In one case, the mother had blood type B and the child had blood type O. Which of the following blood types could the father NOT have?
A) B B) A C) AB D) O