Which of the following signals is not a signal that may cause a change in gene expression in complex multicellular organisms?
A. oxygen levels
B. nutrients in the environment
C. temperature
D. hormones
E. All of these influence gene expression in
complex multicellular organisms.
E
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Each of these regions, which can be found on a multitude of different continents, is an
example of a __________.
a. disturbance b. life zone c. habitat d. niche
The DNA sequence of two alleles of the same gene can differ by
A) approximately 100 continuous base pairs. B) approximately 100 base pairs scattered throughout the gene. C) three base pairs (one coding triplet). D) one base pair. E) no base pairs; allele sequences can be identical.
In mammals, oxytocin is released during _____.
A. sexual intercourse only B. lactation only C. labor only D. sexual intercourse, lactation, and labor E. sexual intercourse and labor
Escherichia coli is a good indicator of fecal contamination of water supplies.
Answer the following statement true (T) or false (F)