Which of the following is essential to the process genetic engineering?
A. selective breeding
B. sexual reproduction
C. random genetic mutations
D. recombinant DNA
E. artificial selection
Ans: D. recombinant DNA
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The selective permeability of a membrane refers to ____
a. the movement of a molecule from an area of greater concentration to an area of lesser concentration. b. the ability of a substance to pass through a membrane c. the ability of only certain molecules to pass across a membrane d. the need for carrier proteins to transport some molecules e. the ability of molecules to be transported across the membrane only certain times of the day
If a person were experiencing lack of understanding of emotional situations or seemed unable to recognize displays of emotion by other individuals, the likely area of brain trauma would be the
A. pons. B. thalamus. C. amygdala. D. reticular formation. E. hippocampus.
Within the mollusks, only the cephalopods have a
A) hinged shell. B) closed circulatory system. C) tubular gut. D) radula. E) coelom.
Crossing over is often reduced around centromeric regions of chromosomes. If you were trying to construct a genetic map of two linked marker loci in this region, what result might you obtain?
A. The recombination frequencies would be high, and you would deduce that the markers were very far from one another. B. The recombination frequencies would be low, and you would deduce that the markers were very far from one another. C. The recombination frequencies would be high, and you would deduce that the markers were very close to one another. D. The recombination frequencies would be too low to detect, and you would not be able to estimate the distance between genetic markers. E. The recombination frequencies would be low, and you would deduce that the markers were very close to one another.