If the duration of life on Earth was on a comparative scale of 20,000 days, for how many of those days would the human species be present?
A. 1
B. 100
C. 2000
D. 10,000
E. 20,000
Answer: A
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In DNA molecules, cytosine pairs with adenine.
a. thymine pairs with uracil. b. adenine pairs with uracil. c. adenine pairs with thymine. d. cytosine pairs with thymine.
Chromatin is composed of DNA and special packaging proteins called hopanoids
Indicate whether the statement is true or false
What process produces genetic diversity through random distribution of chromosomes?
A) cytokinesis B) recombination C) crossing over D) alignment of the metaphase plate to one side instead of in the middle E) independent assortment
If the nerves between the eyes and the ears were switched, stimulation of the mechanoreceptors in the ear would result in
A. seeing lights. B. hearing sounds. C. blindness. D. both hearing sounds and seeing lights. E. deafness.