Interactions between organisms that are beneficial to both species involved are called ____
a. abiotic
b. food chains
c. ecological niches
d. symbiotic relationships
e. Allen's Rule relationships
d
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The invention and rapid diffusion of more productive agricultural techniques is called ________, that involves introduction of ________ and the expanded use of ________
A) mass production, hydroponics, herbicides B) the Agricultural Revolution, new tractors, advanced watering C) mass production, higher-yield seeds, fertilizers D) the Green Revolution, higher-yield seeds, fertilizers E) the Green Revolution, new tractors, inter-cropping
Anthropogenic pollution is caused by
A) people. B) animals. C) climate. D) rocks. E) sun spots.
What is true about remaining fossil fuel reserves with respect to climate change?
A. We can burn the remaining reserves without serious consequences. B. About 10% of all fossil fuel reserves should be left in the ground. C. At least 82% of coal reserves and half of natural gas reserves should be left in the ground. D. We can burn the remaining reserves as long as we also produce more renewable energy. E. We cannot burn any of these reserves if we want to avoid climate change tipping points.
The Earth has been deglaciating for the last ________ years
A) 900 B) 9,000 C) 90,000 D) 900,000 E) 9,000,000