A sodium ion (Na+) has:
A) gained an electron
B) lost an electron
C) formed an anion
D) a negative charge
E) gained a proton
Ans: B) lost an electron
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True or false: Adaptive radiation is an acceleration of speciation and adaptation when there are a large number of ecological opportunities available
A. true B. false
You are looking at sonograms and are observing fetal bones. During a 6-week-old fetus sonogram you observe
A. calcified cartilage in the long bones. B. cartilage in the long bones. C. compact bone in the long bones. D. spongy bone in the long bones. E. a lack of bone structure.
The world’s forests are rapidly being lost to
a. fires. b. fungal diseases. c. logging. d. hurricanes. e. decrease in soil fertility.
All of the following may be targeted by TC cells, except
A. invading bacterial cells. B. viral-infected host cells. C. cells in transplanted tissue from an imperfectly matched donor. D. cancer cells. E. All of these cells could be targeted by Tc cells.