Proteins that recognize unfolded polypeptides and help them fold into their proper conformations are called ________.
Fill in the blank(s) with the appropriate word(s).
chaperones
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If we were to discover beings on a distant planet that looked very much like us, it would probably be
cited as an example of
a. coincidence. b. convergent evolution. c. homology. d. adaptive radiation. e. genetic drift.
The scrotum is a sac-like structure outside the abdomen in which the testes are suspended. Why is this structure essential?
A. Sperm must be closer to the penis to be ejaculated. B. There is not enough space in the abdomen to grow properly. C. Lower temperature is required for normal development of sperm. D. There is too much hormonal influence if they remain in the abdomen.
. A bell-shaped curve of phenotypic variation is indicative of
a. incomplete dominance. b. continuous variation. c. multiple alleles. d. epistasis. e. environmental variables on phenotypes.
Autotrophs include which of the following?
a. fungi. b. plants. c. animals. d. all of the above.