Heredity plays a major role in about what percent of cancers?
a. 1%
b. 5%
c. 10%
d. 25%
e. 50%
ANSWER: b
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What plant growth regulator(s) inhibits growth of the plant, and opposes the action of the growth-promoting regulators?
a. gibberellins b. ethylene c. abscisic acid d. cytokinins e. auxins
__________ are animals with a backbone. Fill in the blank(s) with the appropriate word(s)
The phrase "all or nothing," used in conjunction with discussion about an action potential, means that
a. a resting membrane potential has been received by the cell. b. nothing can stop the action potential once the threshold is reached. c. the membrane either achieves total equilibrium or remains as far from equilibrium as possible. d. propagation along the neuron is saltatory. e. the action potential is strong.
Most combinations of different ABO alleles result in complete dominance of one allele. Which combination results in codominance?
A) IAi B) IAIB C) IBi D) ii E) either IAi or IBi