The diameter of a capillary is about the same as that of a(n)
A) nerve.
B) red blood cell.
C) arteriole.
D) venule.
Answer: B
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Mating a purebred Labrador retriever to a purebred poodle to produce "Labradoodles" is an example of
A. true-breeding. B. hybridization. C. self-fertilizing. D. inbreeding. E. mixed breeding.
What are some of the different respiratory systems seen in animals?
What will be an ideal response?
Conjugation, transformation, and transduction are all ways that bacteria
A) reduce their DNA content. B) increase the amount of RNA in the cytoplasm. C) increase their genetic diversity. D) alter their oxygen requirements.
Biologically speaking, a pigment is a:
A) molecule that absorbs a photon. B) molecule that releases oxygen. C) molecule that absorbs carbon dioxide. D) cell that absorbs a photon. E) cell that fixes carbon.