The functional barrier between blood and the brain is cerebrospinal fluid

Indicate whether the statement is true or false


FALSE

Biology & Microbiology

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The compound ethylene oxide is used in

A) sanitization. B) sterilization. C) antisepsis. D) degerming. E) disinfection.

Biology & Microbiology

Which of the following is the most correct description of the function of reverse transcriptase?

A) It synthesizes a DNA strand from an RNA template, degrades the RNA strand, and replaces the RNA with a new DNA strand. B) It synthesizes an RNA strand from an integrated DNA, then synthesizes the complementary strand to produce a double-stranded RNA. C) It synthesizes a DNA from an integrated DNA template, then synthesizes multiple RNA copies of the newly synthesized DNA molecule. D) It synthesizes an RNA strand from an infecting single-strand RNA then synthesizes multiple RNA copies of both strands. E) It synthesizes a DNA strand from an infecting RNA strand, then uses the DNA as a template for synthesis of multiple new RNA strands.

Biology & Microbiology

Which scenario is not an example of a prezygotic isolating mechanism?

a. An iris blooms at a different time of the year than a daffodil. b. A peacock puts on a different mating display than a sparrow. c. A snail with a shell coiling in one direction cannot mate with a snail whose shell curls in the other direction. d. A zebroid, a cross between a horse and zebra, is sterile. e. One type of roundworm would reject the sperm from another species of roundworm.

Biology & Microbiology

Organisms sense and respond to changes both inside and outside the body by way of

a. metabolism.

b. photosynthesis. c. receptors. d. catabolism. e. anabolism.

Biology & Microbiology