Which marine ecosystem has average net primary productivity comparable to a tropical rainforest?
A) Algae beds and coral reefs
B) Estuaries
C) Freshwater swamp and marsh
D) Open Ocean
E) Upwelling zone
A
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What is the main drawback of all-electric cars that do not consume any fossil fuels onboard?
A. They still depend on burning coal to be recharged. B. They increase the emission of ozone depleting chemicals. C. They consume more energy than they save. D. They only work in tropical to temperate climates.
Classify the following properties as physical or chemical.Turns into a silvery liquid when heated in the absence of oxygen.
Fill in the blank(s) with the appropriate word(s).
What is the first law of thermodynamics, and what are its implications for natural resource management?
What will be an ideal response?
Low, layered clouds associated with gray, overcast skies are called ____
a. cirrus b. stratus c. lenticular d. cumulonimbus e. cumulus