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Chapter 47: 16. (page 1401)

About what percentage of land on the planet is set aside

as a preserve of some type?

a. 1 percent

b. 6 percent

c. 11 percent

d. 15 percent

Short Answer

Expert verified

The correct option is (c).

Step by step solution

01

Step 1. Given information

The question enquires about the land on the planet is set aside as a preserve of some type.

02

Step 2. Description 

At the moment, 11% of the Earth's land surface is guarded in a certain way. The science of island biogeography has aided in the optimal design of preserves; however, preserves are constrained by political and economic influences.

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Most popular questions from this chapter

Scientists measured the relative abundance of fern spores above and below the K-Pg boundary in this rock sample. Which of the following statements most likely represents their findings?

a. An abundance of fern spores from several species was found below the K-Pg boundary, but none was found above.

b. An abundance of fern spores from several species was found above the K-Pg boundary, but none was found below.

c. An abundance of fern spores was found both above and below the K-Pg boundary, but only one species was found below the boundary , and many species were found above the boundary.

d. Many species of fern spores were found both above and below the boundary, but the total number of spores was greater below the boundary.

Pollination is an example of ________.

a. a possible source of new drugs

b. chemical diversity

c. an ecosystem service

d. crop pest control

The number of currently described species on the planet

is about ________.

a. 17,000

b. 150,000

c. 1.5 million

d. 10 million

Which of the following statements is not

supported by this graph?

a. There are more vulnerable fishes than critically

endangered and endangered fishes combined.

b. There are more critically endangered amphibians

than vulnerable, endangered and critically

endangered reptiles combined.

c. Within each group, there are more critically

endangered species than vulnerable species.

d. A greater percentage of bird species are critically

endangered than mollusk species.

Which two extinction risks may be a direct result of the

pet trade?

a. climate change and exotic species introduction

b. habitat loss and overharvesting

c. overharvesting and exotic species introduction

d. habitat loss and climate change
See all solutions

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