Charles Darwin and his son experimented with which plant growth response?
A. gravitropism
B. circadian rhythms
C. phototropism
D. heat shock
E. thermotropism
C. phototropism
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A thermal inversion refers to
a. a layer of cool air trapped underneath a warm-air layer. b. the temperature of the atmosphere above land as opposed to the temperature of the atmosphere above bodies of water. c. a temperature-induced change in weather patterns. d. the cooling of the atmosphere at night. e. abnormal temperature changes in a season.
In the lagging stand, the DNA is read from the parental DNA's 3' to 5' end.
a. true b. false
Which base in an anticodon will pair with the base adenine in a codon?
A. thymine B. uracil C. cytosine D. guanine
Why is the ratio of male to female births roughly 50:50?
a. half of all sperm cells carry a Y chromosome b. all eggs carry an X chromosome c. half of all egg cells carry a Y chromosome d. all sperm cells carry an X chromosome