Body cells have self-markers located
a. in their nuclei.
b. in the endoplasmic reticulum.
c. in the mitochondria.
d. on the plasma membrane.
e. inside the Golgi bodies.
D
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In biological nitrogen-fixation,
a. ammonia is converted to nitrogen gas. b. nitrogen gas (N2) is converted to ammonia (NH3). c. ammonia is converted to nitrate. d. amino acids are linked into proteins in ribosomes. e. nitrate is converted to ammonia.
The four eras each represents an equal time of Earth's history.
A. True, the four eras are each roughly the same length of time B. False, the four eras are vastly different in their durations
All living things have the following characteristics except
a. responsiveness to external and/or internal stimuli. b. utilization of energy. c. self-replication. d. growth. e. sexual reproduction.
____ is the most fatal genetic disorder in the United States
a. Cystic fibrosis b. Huntington’s disease c. Sickle cell anemia d. Anhidrotic dysplasia e. Color blindness