A cross is made between a female calico cat and a male cat having the gene for black fur on his X chromosome. What fraction of the offspring would one expect to be calico?
A) 1/4 B) 1/2 C) 3/4 D) 2/3 E) none
Answer: A
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Which soil component(s) have a negative charge that attracts positively charged mineral ions in soil water?
a. sand b. silt and sand c. clay d. humus e. clay and humus
What is NOT true concerning creatine?
a. It is sold as a performance enhancer. b. Muscles use its phosphorylated form as an instant energy source. c. The body normally makes some and takes in more from food. d. Its production is highly regulated e. Long-term side effects of creatine are unknown.
What facilitate the rapid transport of water through the plasma membrane?
a. osmosis b. uniporters c. aquaporins d. channel proteins e. ABC transporters
If wolves were now removed from Yellowstone National Park
A) elk populations would increase. B) deer populations would decrease. C) the vegetation would remain unchanged. D) vegetation would increase, providing shelter for smaller animals.