Questions: 4. Conservation biologists estimate that the rate of extinction is than the estimated natural background extinction rate. A. Ten times lower B. Ten times higher C. A billion times higher D. A thousand times higher E. A million times higher 5. Hunting is a tool of wildlife management A. For all species B. Which increases revenue needed for management projects C. Which increases the size of a population D. Which decreases the health of a population 6. Why do scientists use random sampling? A. Animals move B. There may only be a few scientists and many organisms to count C. The habitat may be very large D. Only B and C E. All of the above 7. All of the following are species whose populations are expanding rapidly in Texas because they have no predator here EXCEPT: A. Chinese Tallow Tree B. Fire Ants C. Feral Hogs D. Monarchs 8. Armand Bayou Nature Center uses prescribed burns, mowing, and grazing to maintain the biodiversity and health of their Gulf Coastal Prairie. These management practices are an application of: A. Habitat fragmentation B. Primary succession C. Natural selection D. The intermediate disturbance hypothesis

Let's address the first three questions as per the guidelines:

Conservation biologists estimate that the rate of extinction is $\qquad$ than the estimated natural background extinction rate.

• The answer is D: A thousand times higher

Explanation:

• A. Ten times lower: This is incorrect because current extinction rates are significantly higher than the natural background rate.
• B. Ten times higher: This is an underestimate. The current extinction rate is believed to be much higher.
• C. A billion times higher: This is an overestimate and not supported by scientific consensus.
• D. A thousand times higher: This is the most accurate estimate according to many conservation biologists.
• E. A million times higher: This is also an overestimate.

Hunting is a tool of wildlife management

• The answer is B: Which increases revenue needed for management projects

Explanation:

• A. For all species: This is incorrect because hunting is not used for all species, especially those that are endangered or protected.
• B. Which increases revenue needed for management projects: This is correct. Hunting licenses and fees often provide significant funding for wildlife management and conservation efforts.
• C. Which increases the size of a population: This is incorrect. Hunting typically reduces population size, though it can help manage population levels to prevent overpopulation.
• D. Which decreases the health of a population: This is incorrect. When managed properly, hunting can help maintain the health of a population by preventing overpopulation and resource depletion.

Why do scientists use random sampling?

• The answer is E: All of the above

Explanation:

• A. Animals move: This is correct. Random sampling helps account for the movement of animals, making the data more representative.
• B. There may only be a few scientists and many organisms to count: This is correct. Random sampling is efficient when resources are limited.
• C. The habitat may be very large: This is correct. Random sampling allows scientists to study large areas without having to count every organism.
• D. Only B and C: This is incorrect because A is also a valid reason.
• E. All of the above: This is correct as it includes all the valid reasons mentioned.

1. The rate of extinction is estimated to be a thousand times higher than the natural background extinction rate.
2. Hunting is a tool of wildlife management which increases revenue needed for management projects.
3. Scientists use random sampling because animals move, there may be only a few scientists and many organisms to count, and the habitat may be very large.