Which of the following functions performed by the skin would be lost or seriously compromised if someone suffered a severe burn over most of the body?
A. prevention of heat and water loss
B. conversion, in the presence of ultraviolet light, of precursor molecules to vitamin D
C. production of sweat that evaporates and cools the body when it is overheating
D. prevention of massive and continuous infection from invasion by external bacteria, viruses, and parasites
E. All of these are vital functions of the skin and would be compromised.
Answer: E
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A particular variant of the lambda bacteriophage has a DNA double-stranded genome of 51,365 base pairs. How long would this DNA be?
What will be an ideal response?
Which of the following statements about members of the Kingdom Plantae is FALSE?
A) They are multicellular. B) They are composed of eukaryotic cells. C) They undergo photosynthesis. D) They use organic carbon sources. E) They synthesize organic molecules.
Mycorrhizae
A. are vital for the survival of lichens. B. are vital for the survival of many plants. C. increase the absorptive ability of roots. D. are used in the production of wine, beer, and bread. E. are vital for the survival of many plants AND increase the absorptive ability of roots.
In order to test a hypothesis, a scientist would measure which of the following during an experiment?
a. the independent variable b. the dependent variable c. the standard variable d. the constant