Which of the following is the usual trigger for seed germination?
A) water
B) warm temperatures
C) oxygen
D) sunlight
A
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The shaded group includes all of the species that were derived from one common ancestor, this group could also be called a(n)
A. polyphyletic taxon.
B. paraphyletic taxon.
C. phylum.
D. homology.
E. clade.
Neurotransmitters may be removed from the synaptic cleft by:
a. enzymatic breakdown or pumping back into presynaptic cells b. enzymatic breakdown only c. pumping back into presynaptic cells only d. neutralization by antibodies e. ionic degradation
Gene expression in bacteria is regulated primarily by:
a. controlling the rate of DNA replication. b. protein modifications. c. protein degradation. d. transcriptional control. e. translational control
If an environment changes rapidly, organisms with _____ will be more likely to survive and reproduce.
A. the correct allele frequency B. existing neutral mutations C. existing beneficial mutations D. the ability to produce beneficial mutations E. the ability to adapt their genotype