In humans, the genes for blood type A and B show lack of dominance to one another and both dominate O. Two type O people would be able to have
A. 1 O: 1 A: 1 B: 1 AB type children.
B. only O type children.
C. 1 O: 1 A type children.
D. only AB type children.
B. only O type children.
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Which number identifies the site where activators bind?
a. 2 b. 3 c. 4 d. 5 e. 6
Which of the following is correct about
melatonin?
a. it protects against certain cancers b. it encourages the growth of certain cancers c. it causes a decline in body temperature d. all of these (a through c) are correct about melatonin e. one of these (a through c) is incorrect about melatonin
In various experiments that recreated conditions on the early Earth, molecules such as amino acids,
glucose and ribose were produced from a. clay. b. ether. c. formaldehyde. d. alcohols. e. ATP.
Which group of vertebrates possessed an anatomical feature that made evolution of the limbs of all tetrapods possible?
A) reptiles B) amphibians C) lobe-finned fish D) sharks