Which of the following is NOT an element?
a. water
b. oxygen
c. carbon
d. chlorine
e. hydrogen
A
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Two-thirds of the available freshwater is
a. used as drinking water for animals. b. used as drinking water for humans. c. used for irrigation. d. wasted.
What invention about 11,000 years ago led to a boom in the human population?
a. the wheel b. agriculture c. the printing press d. the steam engine e. the written language
As bone develops and becomes hard, osteocytes become trapped in hollow chambers called lacunae
Indicate whether the statement is true or false
You isolate a plant that expresses a phytochrome mutant that is always in the Pfr form. You expect these plants will germinate
A. regardless of the light conditions. B. later than normal plants. C. similarly to normal plants. D. not at all.