Question

Question 64. Earth has experienced five previous mass extinction events Many ecologists now believe we are experiencing a sixth mass extinction. How does this current mass extinction differ from previous extinction events? The background extinction rate now is much higher now than in previous a. extinction events b. The background rate of extinction is higher now than the rate of biodiversity so the current extinction event is more pronounced than previous ones. There are no differences in the previous and current extinction events since c· they all resulted in the sudden disappearance of at least half of all living d· The activities of one species are largely driving the current extinction event. Ecologists cannot accurately quantify extinctions so little is known about the e. causes of previous and current extinetion events Question 65. What is the primary difference between conservation biology and restoration ecology? Conservation biology is an applied science, while restoration ecology is not. Conservation biology focuses on securing and protecting intact ecosystems while restoration ecology focuses on the creation or improvement of ecosystems. Both conservation biology and restoration ecology attempt to conserve species for continued ecosystem function. Conservation biology introduces native plants and other species to foster a. b. c. d. natural ecosystem processes, while restoration ecology only focuses on the removal of invasive species. There is no difference (other than their names) between conservation biology e. and restoration ecology. Questions 66-69. Match each definition in the left column with a term from the right column Definition imminent danger over a significanta. Terms Question 66. Species in imminent danger over a significant a endangered species portion of their range b· threatened species c. global climate change d. greenhouse effect Question 67. Changes in Earth's climate, including temperature, precipitation, and other variables Question 68. Warming of the earth's atmosphere and surface as a result of atmospheric gases trapping radiation and re-directing this heat to the earth's surface Question 69. Species that are likely to become endangered n the near future

Answer 1

Ans 64: b

Ans 65: c

The conservation and restorationof cultural heritage focuses on protection and care of tangible cultural heritage, including artworks, architecture, archaeology, and museum collections. Conservation activities include preventive conservation, examination, documentation, research, treatment, and education.

Ans 66: b

A species that is in danger of becoming endangered; it is likely pressured in some of its habitats or is having other issues

Ans 67: c

Global Climate Change is any change in aspects of Earth's climate, such as temperature, intensity, and frequency of storms.

Ans 68: d

Greenhouse Effect is the warming of Earth's surface and atmosphere (especially the troposphere) caused by the energy emitted by greenhouse gases.

Ans 69: a.