Sample/practice exam 2020, questions and answers PDF

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Download Sample/practice exam 2020, questions and answers PDF

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Question 1 5 out of 5 points This refers to regions that are home to thousands of irreplaceable species that are facing multiple, urgent threats.

Selected Answer: C. biodiversity hotspot •

Question 2 5 out of 5 points This is the process where particular beneficial trait is reproduced in succeeding generations more than the other traits.

Selected Answer: D. natural selection •

Question 3 5 out of 5 points Why is it important to identify biodiversity hotspots?

Selected Answer: •

B. to better help direct the resources to the places that require our greatest attention

Question 4 5 out of 5 points This is a species that has a disproportionately large effect on the communities in which it occurs. Such species help to maintain local biodiversity within a community either by controlling populations of other species that would otherwise dominate the community or by providing critical resources for a wide range of species.

Selected Answer: D. keystone species •

Question 5 5 out of 5 points Most scientists would argue that we are on the verge of 6th mass extinction. What is causing this mass extinction?

Selected Answer: C. humans •

Question 6 5 out of 5 points Biodiversity hotspots make up for this much of Earth’s land surface, but 44 percent of the world’s plants and 35 percent of land vertebrates live in these regions.

Selected Answer: B....