Some invertebrates move gases across their cell's membrane by ___ through interstitial fluid
a. active transport
b. facilitated diffusion
c. bulk transport
d. diffusion
e. osmosis
ANSWER: d
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A microtome is used to
A) view microscopic organisms. B) slice thin sections of specimens. C) focus short wavelengths of light. D) manipulate tiny objects. E) dissect cellular organelles.
A man with trisomy 21 could pass Down syndrome to offspring if he
A) produces sperm that have two copies of chromosome 21. B) produces sperm lacking chromosome 21. C) also has Turner syndrome. D) is a carrier of a deletion for chromosome 21.
Could two phenotypically normal parents have a color-blind child?
a. Yes b. No
Which statement about taste receptors is NOT true?
A. Taste receptors are found only on the tongue in animals. B. Taste receptors generate nerve impulses in associated sensory nerve fibers. C. Taste receptors recognize sweet, sour, bitter, salty and umami sensations. D. Taste receptors are chemoreceptors. E. Taste receptors are located within taste buds in humans.