The diagram below shows that C4 plants photosynthesize more efficiently than C3 plants at high temperatures. This is because
A) C4 plants make use of chemosynthesis as well as photosynthesis.
B) C4 plants are able to minimize water loss through the stomates more efficiently than C3 plants.
C) C4 plants make use of the Calvin cycle to photosynthesize over a wider range of hours, while C3 plants do not.
D) C4 plants have larger chloroplasts than C3 plants.
B) C4 plants are able to minimize water loss through the stomates more efficiently than C3 plants.
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The Exxon Valdez oil spill in Alaska was the largest oil spill to date in U.S. waters.
Answer the following statement true (T) or false (F)
The country in Central America that gained its independence in 1981 from the British is
A. Costa Rica B. El Salvador C. Belize D. Panama
The cost of damage to building surfaces, monuments, and other structures caused by acid deposition is estimated to run into the ____ of dollars each year
a. thousands b. hundreds of thousands c. millions d. billions e. trillions
Cities in the world's core have the potential to contribute significantly to the mitigation of pollution and climate change because core cities
A) produce such huge amounts of greenhouse gas emissions that small changes can have comparatively big results. B) are already the greenest cities. C) have growing amounts of brownfield sites. D) are reurbanizing.