What benefit does running a fever provide to a sick person?
What will be an ideal response?
Raising the body's temperature increases the effectiveness of the immune response and helps inhibit viral and bacterial growth.
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Experiments with mouse cells indicate that long noncoding RNAs ____
a. block cardiac cell development b. play a role in cardiac cell differentiation c. are not expressed in embryonic stem cells d. are only expressed after cardiac cells have differentiated e. are transcription factors that promote cardiac cell differentiation
Why do we have fossils for only about 250,000 different species, although there must have been millions more species?
1.Fossils can form only if exposed to air, and most fossils are buried.
2.Fossils formed only where there were major disruptive geologic events, so they are relatively rare.
3.Fossils are found close to the surface so many have been destroyed by development.
4.Many ancient and extinct species were very soft, so did not fossilize well.
The profundal zone is indicated by
a. A. b. B. c. C. d. D. e. none of these.
Since O2 is being released, it can be inferred that the plant is doing which of the following?
a) producing glucose/sugar b) releasing energy from water c) making protein