A pioneer community of plants is essentially a single ________
A) plant
B) seral stage
C) climax forest
D) localized extinction
E) migration path
Answer: B
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The Berkeley Earth Team estimates that Earth's average temperature increased about ________ since the 1950s.
A. 0.5°C B. 1.0°C C. 5.0°C D. 0.1°C E. 2.0°C
In the past, most Western ethics concerning the human relationship to the natural environment have been based on
A) the utility of the environment to humans. B) conserving natural ecosystems without alteration. C) the aesthetic value of natural systems. D) reverence and respect for the spiritual aspects of the natural world.
People whose jobs involve collecting, processing and transmitting information in novel ways are called the ________ class
Fill in the blank(s) with correct word
Why is the sky blue?
A. Light is absorbed in the atmosphere. B. Light is reflected from the atmosphere. C. Light is scattered in the atmosphere.