Half siblings share on average 50% of their alleles by inheritance from their shared parent, making their degree of
relatedness 0.50.
a. True
b. False
ANSWER: False
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Which mammalian group lays eggs?
a. monotremes b. eutherians c. polytherians d. metatherians e. marsupials
Which population is more likely to be affected
by genetic drift?
a. 12 squirrels in a forest b. 49 herons in a colony c. 215 fleas on a dog d. 1350 mice in a house e. 3000 zebra in a herd
Which of the following is NOT true regarding acid
rain? a. It is related to the disappearance of fish populations in more than 200 lakes in the Adirondack Mountains. b. Highly alkaline soils neutralize the acids in acid rain. c. Acid deposition does NOT occur in dry weather. d. It contributes to the decline of forests. e. Its pH can be as potent as that of lemon juice.
Why do sex hormones and other steroids take much longer to produce their effects than nonsteroid hormones do?
A) Steroids are bigger, slower molecules. B) Steroids must usually be carried longer distances by the blood. C) Steroids must relay their messages via relay molecules. D) Steroids cause target cells to make new proteins, which takes time.