The double helix model of DNA structure was proposed by

A. Chargaff.
B. Griffith.
C. Franklin.
D. Watson and Crick.
E. Avery.


Answer: D

Biology & Microbiology

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The plant hormone ____ trigger plant responses to environmental stresses such as cold snaps, high salinity, and

drought.

a. abscisic acid b. cytokinin c. oligosaccharin d. jasmonate e. ethylene

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All of the following would help to reduce the amount of greenhouse gases in the atmosphere EXCEPT

a. planting trees. b. reducing emissions from factories. c. reducing water usage. d. using solar heat in homes. e. walking to work.

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Through genetic engineering, it is possible for scientists to identify the sequence of bases in DNA, determine the location of certain genes in DNA, and create more DNA from DNA samples

Indicate whether the statement is true or false

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Which of the following is a normal skin resident?

A. Clostridium perfringens B. Staphylococcus aureus C. Streptococcus mutans D. Staphylococcus epidermidis

Biology & Microbiology