Insulators:
A. are boundary elements that function to prevent the enhancer for one gene from activating the promoter of another gene.
B. are DNA sequences that can prevent packaging of a gene into heterochromatin.
C. require the zinc-finger protein CTCF to function in higher eukaryotes.
D. All of the choices are correct.
D
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Which hypothesis states that the synthesis of DNA or RNA from the small molecules in the ocean would have come after the evolution of the plasma membrane and enzymes?
A. clay-catalyst hypothesis B. protein-first hypothesis C. chloroplast D. RNA-first hypothesis
Which of these describes antagonistic pleiotropy?
A. The later in life that a mutation affects fitness, the weaker the selection against that mutation. B. Mating only once in life, then dying. C. Genes that increase reproduction may decrease survival later in life. D. Delaying reproduction until conditions are more favorable. E. Cellular damage that lowers survival and reproduction with age.
Life history adaptations of ________ populations are characterized by an early age of first reproduction and short maturation time and life span.
A. K-selected B. r-selected
Which of the following is a by-product of both Swiss cheese and beer production?
A. acetic acid B. carbon dioxide C. ethanol D. lactic acid E. pyruvic acid