__________ power(s) the movement of water between reservoirs
a. Clouds
b. Glaciers
c. Temperature changes
d. The sun
D
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Which of the following extraembryonic membranes encloses the embryo?
a. amnion b. chorion c. yolk sac d. allantois
Anchovies are an efficient fish to catch because they:
a. are grazers. b. are filter feeders. c. travel in large dense schools. d. are small fish. e. swim quickly.
The polarity of DNA synthesis is
A) 5'?3'. B) 3'?5'. C) 5'?2'. D) 2'?5'.
You have placed cultures in an anaerobe jar, activated the gas pack, and sealed the jar. Later in the day you check the jar and notice that the methylene blue strip is colorless. What does this indicate?
There is a leak in the seal and oxygen is entering the jar. An anaerobic environment has been successfully established within the jar. The chemical reactions in the GasPak have not worked properly and no CO2 has been produced within the jar. The palladium catalyst must be reactivated.