Which of the following statements about organic compounds is true?
A) Only naturally occurring compounds are considered organic compounds.
B) The number of naturally occurring compounds and the number of synthetic compounds are approximately equal.
C) The number of naturally occurring compounds greatly exceeds the number of synthetic compounds.
D) The number of naturally occurring compounds is much smaller than the number of synthetic compounds.
D
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The United States exports its popular culture through various types of media including magazines, television and movies. Why are some countries opposed to this?
What will be an ideal response?
Two different air masses oppose each other with little or no movement at:
a. a cold front. b. a stationary front. c. a warm front. d. an occluded front.
In the diagram below, A is the
A) hadal zone.
B) mesopelagic zone.
C) epipelagic zone.
D) benthic zone.
Which of the following represents a type of top-down regulation for wildflowers living in a forest?
A) Types of minerals in the soil B) Amount and timing of precipitation C) Strength and frequency of sunlight D) Herbivores in the region