In an organism with 16 chromosomes per cell, how many DNA molecules are present in a cell undergoing anaphase of mitosis?
A) 8
B) 16
C) 24
D) 32
E) 64
D
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Adaptive radiation is
a. the basis of radiometric dating. b. development of similar body form in unrelated organisms. c. formation of beneficial alleles through exposure to radiation. d. origin of many species from a single common ancestor. e. spread of successful alleles from one population to another.
Why did internal fertilization likely evolve?
A. To increase the chances of successful fertilization. B. As a response to copulation. C. Because there were no safe places to lay eggs. D. As an adaptation to life in a terrestrial environment.
Which of the following are symptoms of hypothyroidism?
a) Fatigue b) Weight Gain or increased difficulty in loosing weight. c) Diarrhea d) A and B only e) All of the above
What are enzymes called that control the activities of other proteins by phosphorylating them?
A) ATPases B) chromatin C) phosphatases D) cyclins E) kinases