Why is older climate data smoother when graphed than the present spikiness?
A) Climate was unusually steady millions of years ago.
B) Each data point represents less years in the older data.
C) Each data point represents more years in the older data.
D) Both A and C
Answer: C
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What is the difference between pluripotent stem cells and multipotent stem cells?
A) There is no difference, they are two different names for the same cells. B) Pluripotent stem cells can form any type of cell , but multipotent stem cells can only form a limited number of cell types. C) Multipotent stem cells can form any type of cell, but pluripotent stem cells can only form a limited number of cell types. D) Multipotent stem cells can form all cell types, but pluripotent can only form new pluripotent stem cells.
Which one of these is a high silica rock that cooled at the surface?
A. Basalt B. Gabbro C. Granite D. Rhyolite
Which biome has extreme temperature differences between winter and summer, may contain prairie dogs, and has been extensively converted to agriculture?
a. Tropical rainforest b. Temperate grasslands c. Temperate rainforest d. Taiga
Longshore drift ________.
A. is enhanced by groin placement B. does not exist in cliffy regions C. is reduced by waves D. acts like an offshore river E. is too far offshore to be a concern