The light reactions of photosynthesis consume which of the following?
A) carbon dioxide
B) water
C) both a and b
D) neither a nor b
B
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Which of the following substances can be condensation nuclei?
A. smoke from forest fires B. pollen particles C. phosphoric acid particles D. salt from mines
The geocentric model of the Universe placed the Earth at the center of the Universe, while the heliocentric model placed the Sun at the center. So the two concepts are opposite to each other.
a. true b. false
Infectious diseases are a much greater problem in developing countries than in developed nations. In developing countries, such diseases account for nearly half of all deaths. This is because ________
A) developing countries generally lack many of the health and medical services found in developed countries B) virtually no developed nation is willing to help the developing countries with their infectious disease problems C) most of the developing countries are in tropical climates and medicines don't work well in these climates D) even when medical care is available, many people in developing nations do not have the money to pay for it E) Both A and D.
The trade winds diverge from which pressure belt?
What will be an ideal response?