A mother with blood type A has a child with blood type A. Give all possible blood types for the father of this child.
A. A, AB
B. O
C. B, AB
D. A, B, O
E. A, B, AB, O
Ans: E. A, B, AB, O
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Why are red algae found in deeper oceanic waters?
A. They possess pigments that allow them to utilize red light. B. They are able to utilize the more saline deep water. C. Red algae prefer the warmer deep water. D. They possess pigments that allow them utilize blue-green-light. E. Fewer algae predators are found in deeper water.
In the lac operon, cAMP binds to:
a. lacZ. b. lacA. c. lacY. d. the operator. e. CAP.
The oversecretion of ________ by the thyroid gland can result in ________.
A. T3; hyperthyroidism B. parathyroid hormone; Graves disease C. T3; hypothyroidism D. calcitonin; hyperthyroidism E. T4; hypothyroidism
Two bird species have different mating calls, occupy different habitats in nature, and when they hybridize, the hybrids are infertile. Which isolating mechanisms maintain these species?
A. ecological isolation, mechanical isolation, hybrid sterility B. mechanical isolation, hybrid sterility, geographical isolation C. ecological isolation, behavioral isolation, and hybrid sterility D. geographical isolation, temporal isolation, behavioral isolation