Which of the following is NOT true of polyploidy?
a. It produces twinning in humans.
b. It occurs in plants without negative effects.
c. It results in multiple sets of chromosomes.
d. It could produce three copies of each chromosome.
e. It produces multiple copies of alleles.
A
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Species richness on an island is determined by ____
a. distance from the mainland only b. island size only c. the type of species on the island only d. distance from the mainland and island size e. distance from the mainland and type of species on the island
Friedrich's Ataxia is a disease associated with
a. a loss of muscle coordination. b. weak muscles. c. serious heart problems. d. a loss of muscle coordination and weak muscles e. a loss of muscle coordination, weak muscles, and serious heart problems
?
Figure 30.9A
The effect of directional growth shown in the accompanying figure is known to be caused by ____.
A. thigmotropism B. gravitropism C. abscisic acid D. salicylic acid E. vernalization
The enzyme that converts information stored in RNA to information stored in DNA is
A) DNA ligase. B) reverse transcriptase. C) a restriction enzyme. D) RNA polymerase.