After lowering its body temperature, a shaved shrew would lose less heat by convection.
a. true
b. false
Answer: a. true
(The loss of heat by convection depends on the difference in temperature between the animal’s surface and the surrounding air. If the animal cools, the difference in temperatures decreases, and thus heat loss by convection decreases.)
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What components of eukaryotic cells leave a fossil record?
A. organelles B. nuclear membranes C. cell walls D. None of these choices are correct.
One criticism of the Miller-Urey experiment among scientists is it ____
a. was based on an oxidizing environment b. was likely contaminated with modern atmosphere c. added too much energy d. was based on a reducing environment e. did not add the proper starting components
In an experiment, control groups are used to identify
1.side effects compared to an experimental group. 2.group experiences of the same conditions. 3.group experiences of different conditions. 4.side effects of a hypothesis.
The viral capsid is:
A) a protein coat around the genetic material. B) a fatty membrane surrounding the virus. C) the genetic material at the core. D) the viral offspring that rupture the cell and escape.