In Drosophila, the sex of an individual is determined by
A. 1 pair of alleles.
B. the number of X chromosomes.
C. the number of Y chromosomes.
D. 1 pair of autosomes.
E. 2 pairs of alleles.
B. the number of X chromosomes.
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Which of the following areas of the human body is(are) not normally free of microorganisms?
A. Intestinal tract B. Eyes C. Respiratory tract D. All of the choices are correct.
Discuss one of the pros and cons regarding the application of recombinant DNA technology
What will be an ideal response?
What process(es) are required for phospholipids to flip-flop across the lipid bilayer?
A. The process occurs spontaneously and requires the flippase enzyme. B. The process requires energy and the flippase enzyme. C. The process requires energy. D. The process occurs spontaneously, requiring no energy. E. The process requires an enzyme called flippase.
Which of the following conditions would most likely be due to high blood pressure in a mammal?
A) bursting of blood vessels in capillary beds B) inability of the right ventricle to contract C) reversal of normal blood flow direction in arteries D) destruction of red blood cells