Choose the phrase that best completes this sentence: Microtubules ____________ and are required to pull duplicated chromosomes to opposite poles of dividing cells
(a) generate contractile forces
(b) are intermediate in thickness
(c) can rapidly reorganize
(d) are found in especially large numbers in muscle cells
(c)
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Select the incorrectly-matched osmoregulatory organ and the organism that uses it.
A. Malpighian tubules—insects B. antennal glands—mollusks C. protonephridia—flatworms D. nephridia—annelids E. kidney—fish
Which of the following is NOT associated with
the light-dependent reaction?
a. ATP b. thylakoids c. chlorophyll d. glucose e. water
Following replication of chromosomes, sister chromatids are held together by a(n) ________
Fill in the blank(s) with correct word
A group of dog breeders is trying to design and develop an ideal dog. They want a dog with a gentle disposition, black fur, long ears, short legs, and a strong sense of smell. Which of the following comments from fellow dog breeders represents the
biggest challenge they are likely to face? A) There are breeds with long ears and breeds with short legs, but no breeds with both. B) There does not seem to be any genetic variation in sense of smell. C) Artificial selection is artificial and cannot change the genetics of a breed like natural selection. D) Most dogs with black fur have long legs.