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Approximately how much energy is passed from one trophic level to be stored as growth in the bodies of organisms at the next level?

Question 2

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Elements important to life are cycled through living things, air, soil, and water, but they do not take form as rocks.

Question 3

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In the diagram below, which organism is a producer?

Question 4

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What is the currently accepted scientific explanation for anthropogenic global climate change?

Question 5

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Starting in the 1950s, populations of Atlantic cod were heavily fished by highly efficient commercial trawlers. Catches started to decline in the 1970s and by 1990 several of the fisheries were completely depleted. Was the cod population a renewable resource when fished at that level?

Question 6

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In southern Florida, pet Burmese pythons have escaped and established a population that now numbers in the thousands. In the Florida Everglades biologists report that midsized mammal prey (raccoons, opossum, bobcat, and deer) have declined by over 90% since the python became established. This describes a threat from...

Question 7

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Which actions could be taken to help increase a population of an endangered species? Select all that apply.

Question 8

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How have human activities influenced the nitrogen and/or phosphorus cycles?

Question 9

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Which of these are limiting factors? Select all that apply.

Question 10

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Which of the following is abiotic?

Question 11

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The greenhouse effect is the recent and ongoing shift toward warmer temperatures and other climate disruptions caused by human alteration of Earth’s atmosphere.

Question 12

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Which human activity has the major effect of increasing carbon dioxide levels in the atmosphere?

Question 13

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In the course of its biogeochemical cycling, lots of things can happen to a nitrogen atom. Which of the options below accurately describes what cannot happen to it?

Question 14

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A(n) _____________ consists of members of a single species that live in a specific geographic region.

Question 15

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Which two activities are the main human activities that have led to increased levels of atmospheric carbon dioxide (CO2)?