Questions on Environment

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Question 1 .4 out of 4 points

Use the image below to answer the following question. The world's average footprint per person is about 2.7 hectares per person. At that size, we are depleting our renewable resources 30% faster than they can replenish. The U.S. average footprint is 9.4 hectares, which is approximately __________ times larger than the average world footprint.

Answer
Selected Answer: 3.5
Correct Answer: 3.5

. Question 2 .0 out of 4 points

Which of the following statements is TRUE?
Answer
Selected Answer: Bacteria represent a newer form of life, not present during the early prehistory of Earth. Correct Answer: Species on Earth today are but a fraction of all the species that ever lived.

. Question 3 .4 out of 4 points

Ecosystem services are.;
Answer
Selected Answer: economically valuable services provided by natural systems. Correct Answer: economically valuable services provided by natural systems.
. Question 4 .4 out of 4 points

Which of the following statements about a controlled experiment is TRUE? Answer
Selected Answer: In a controlled experiment, the researcher controls for the effects of all variables except one. Correct Answer: In a controlled experiment, the researcher controls for the effects of all variables except one.

. Question 5 .4 out of 4 points

River water held behind a dam is best described as a form of __________. Answer
Selected Answer: potential energy
Correct Answer: potential energy

. Question 6 .4 out of 4 points

Which of the following statements about a manipulative experiment is TRUE? Answer
Selected Answer: In a manipulative experiment, researchers manipulate the independent variable. Correct Answer: In a manipulative experiment, researchers manipulate the independent variable.

. Question 7 .4 out of 4 points

The cumulative total and kind of living things on Earth are: Answer
Selected Answer: its biodiversity.
Correct Answer: its biodiversity.

. Question 8 .0 out of 4 points

A species has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. Which of the following statements will be TRUE of this species' response to natural selection? Answer

Selected Answer: The species will compensate for loss of genetic variation by hybridizing with other species. Correct Answer: There will be less genetic variation from recombination and a risk of not adapting quickly to environmental change.

. Question 9 .4 out of 4 points

The two processes that determine the world's current biodiversity are __________. Answer
Selected Answer: extinction and speciation rates
Correct Answer: extinction and speciation rates

. Question 10 .4 out of 4 points

Geothermal energy, wind, and solar radiation are all examples of: Answer
Selected Answer: renewable environmental resources.
Correct Answer: renewable environmental resources.

. Question 11 .30 out of 30 points

Referring to the chemical reactions for photosynthesis and respiration, provide an argument for why increasing amounts of carbon dioxide in the atmosphere due to global climate change might potentially increase amounts of oxygen in the atmosphere. Then, give an argument for why it might potentially decrease amounts of atmospheric oxygen. What would you need to know to determine which of these two outcomes might occur? (If you need additional information on global climate change to answer this question, look ahead to pages 494-499.)

Your response should be at least 200 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations. Answer

Selected Answer:
The process of photosynthesis basically turns carbon dioxide into oxyygen...
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