An chemical reaction that requires an input of energy in order to proceed is ________.
A. endergonic
B. impossible
C. exergonic
D. None of the choices are correct.
Answer: A
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What percentage of the trees died after treatment A?
a. 35 percent b. 50 percent c. 65 percent d. 70 percent
__________ are multiple copies of a short DNA sequence that follow one another along a
chromosome. Fill in the blank(s) with the appropriate word(s).
Which of the following is an application of immunofluorescence microscopy?
A) Visualization of the natural fluorescence of a specimen under UV light. B) Identification of specific components of the immune system. C) Identifying which organelle or cellular compartment contains a particular protein. D) Visualization of the surface structures of a specimen. E) Construction of three-dimensional images of structures smaller than 10 nm.
After many years of testing, an hypothesis becomes accepted as a ____
a. fact b. prediction c. theory d. conclusion e. variable