The cochlea is a coiled structure with fluid-filled ducts that holds the mechanoreceptors responsible for
hearing in its __________. Fill in the blank(s) with the appropriate word(s).
organ of Corti
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A mutation that changes the third position in a CUU codon to a C would
A) result in a frameshift mutation. B) shorten the protein. C) have no effect on the protein. D) also change the first two positions.
RNA molecules are usually found as
a. a two-stranded double helix. b. a single strand with some folds and twists where the strand bonds with itself to make some double-helical regions. c. part of a pair with a single DNA strand. d. a single strand that has no double-helical regions. e. an extra strand joined to a DNA double helix.
You are working as a marine biologist off the coast of Mexico. While observing organisms in a tidepool, you find a dramatically colored animal that has not been classified before. Your observations lead you to think that this beautiful animal is apparently a nudibranch, which is a member of the mollusk phylum. However, you are puzzled by one feature that does not fit with the other anatomical and
physiological features of mollusks: stinging nematocysts in the external projections on the back of this animal. Explain how this animal might be correctly classified and what the supporting logic is. What will be an ideal response?
Facilitated diffusion requires a specific transporter for a specific molecule
a. true b. false