The expression of a given gene may be influenced by
a) Activating transcription factors
b) Enhancer sequences
c) Histone modifications
d) All of the above
Answer: d) All of the above
You might also like to view...
What adaptation have the freshwater bdelloid rotifers used to allow them to acquire genetic diversity while reproducing only via asexual reproduction?
What will be an ideal response?
Biologists have found that the genetic code is universal, that the same codons code for the same amino acids in almost all living things. Explain how this can be considered evidence for evolution.
What will be an ideal response?
Refer to the accompanying figure. The function of the structure labeled as 3 is to:
a. secrete an alkaline fluid that neutralizes the acids of the vagina.
b. produce a nutritive fluid for the sperm. c. provide a place for maturation and storage of sperm. d. secrete mucus that lubricates the penis. e. maintain sperm at a low body temperature
The punctuated equilibrium model of evolution suggests that new species appear
A. gradually over very short periods of time so that intermediate species are often observed in the fossil record. B. gradually; as groups become isolated, they slowly evolve through their own individual pathways. C. gradually after long periods of time with little to no change; as groups become isolated, they slowly evolve through their own individual pathways. D. suddenly after long periods of time with little to no change. E. only after older species disappear from the fossil record.