In what layer would one find salamanders in a deciduous forest?
A) canopy
B) shrub layer
C) understory
D) ground
D
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A regulon always includes at least two operons
Indicate whether the statement is true or false.
In humans, the majority of a transcription unit is composed of ____
a. exons b. introns c. promoter regions d. start codons e. regulatory elements
When tumor cell DNA is examined from people at different stages of the same cancer type, mutations that are common to all of them
A) act early in the disease. B) act late in the disease. C) acted on an initial cell and then reverted to wild type. D) entered the cells on the same type of virus.
Widow's-peak hairline in humans is dominant to non-widow's-peak hairline. If a person has a widow's-peak hairline, what is his or her genotype?
A) The genotype is either heterozygous or homozygous dominant. B) The genotype is either homozygous dominant or homozygous recessive. C) The genotype must be homozygous recessive. D) The genotype must be homozygous dominant. E) The genotype must be heterozygous.