Sterility of a laminar flow hood is accomplished by filter-sterilized air passed through the hood quickly enough that non-sterile air does not flow into the work area
Indicate whether the statement is true or false.
Answer: TRUE
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If one strand of a sister chromatid from C. elegans has nine different genes, which of the
following is true about the second strand of the sister chromatid?
a. It will have the exact same genes. b. It will have the same number of genes, but this may be a different gene set. c. It may have a different number of genes. d. There is no correlation between the number of genes on either sister chromatid.
In humans, the surface area of the small intestine is
A. 3 square centimeters. B. 3 square meters. C. 300 square meters. D. 3,000 square meters. E. 300,000 square meters.
Which factors are an example of a negative feedback system?
a. density dependent b. density independent c. intraspecific competition d. interspecific competition e. scramble competition
Most carnivorous plants use their prey as a primary source of
A. nitrogen. B. energy. C. carbon. D. magnesium. E. potassium.