Because all commercially produced energy has some kind of negative environmental impact, it is a good idea to
simply use ____.
a. wind energy
b. solar energy
c. less energy
d. incandescent lightbulbs
e. less water
ANSWER: c
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Place the following steps in the correct order to reflect how a plaque assay is done: _____ Plates from different dilutions are examined and plaques are counted. _____ Dilutions are mixed with the appropriate bacterial host. _____ Bacterial/sample dilution mixtures are plated on agar plates. _____ Several dilutions of sample to be assayed are prepare. _____ Plates are incubated to allow for plaque development.
Fill in the blank(s) with the appropriate word(s).
Ovulation is triggered primarily by
a. high levels of LH. b. low levels of FSH. c. high levels of chorionic gonadotropin. d. high levels of estrogen. e. high levels of progesterone.
Which cell migrates to the thymus gland to mature?
A. mast cell B. B cell C. T cell D. monocyte E. natural killer cell
In terms of meiosis, what is the essential difference between the life cycle of animals and the life cycle of plants?
a. Plants alternate between haploid and diploid generations. b. Animals do not have a haploid phase. c. Animals have a dominant haploid phase. d. Plants alternate between diploid and polyploid generations.