The main difference between sound and light is
A. frequency.
B. their fundamental natures.
C. wavelength.
D. none of the above
Answer: B
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In general, successfully introduced species experience ________
A) increased environmental resistance B) increased competition from other organisms C) increases in limiting factors D) decreased biotic potential E) competitive success against native species
Tropical rain forest or tropical wet climates often experience significant changes in temperature from the warmest temperature of the day to the coldest temperature of the day. Sometimes there is more change in temperature on a daily basis than winter to summer
Indicate whether the statement is true or false
How thick is the atmosphere?
A. About 5000 km B. About 500 km C. About 50 km
Assuming that all other factors are equal, on a hot summer afternoon the biological oxygen demand in a lake will be
A) low because metabolic reactions increase in high temperatures. B) high because metabolic reactions increase in high temperatures. C) low because metabolic reactions decrease in high temperatures. D) high because metabolic reactions decrease in high temperatures.