If nondisjunction takes place in one of the cells of the second meiotic division, the four products of
meiosis will include
A. two normal and two abnormal karyotypes.
B. four abnormal karyotypes.
C. three normal and one abnormal karyotype.
D. four normal karyotypes.
E. none of these.
A
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Hydrolytic enzymes function in the
A) initial degradation of nutrients. B) transport of substrates within the cell. C) chemotactic response, particularly in gram-negative Bacteria. D) regeneration of the periplasm.
Which of the following is not an example of suction feeding?
A. trapping prey with blades of baleen B. rapid expansion of a fish's mouth to take in water and food C. insects obtaining a blood meal D. suckling of young mammals E. All of the answer options are examples of suction feeding.
There are, currently, approximately how many named extant species of plants?
a. 12,000 d. 1,200,000 b. 120,000 e. 2,600,000 c. 260,000
How do saltwater crocodiles communicate with each other?
a. Chemical signals in the environment b. Changing colors c. Posturing and stances d. Calls and barks