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9thENVchp10test

9th ENV Chpt 10 test

QuestionAnswer
What group of organisms are most in danger of extinction? Those with small populations. Those that migrate or need special habitats.
What human activities have influenced recent extinction events? Habitat destruction. Poaching. Introducing exotic species.
Reasons for preserving biodiversity include:? Preventing natural evolution.
How many species are estimated to be living on Earth?? Between 10 and 50 million.
How many species still unknown to modern science? Many of these species are found in remote environments> Smaller species receive less attention than large organisms. Cataloging these species is a huge task.
Where are many critical biodiversity hotspots located? Islands, tropical rain forests, and costal areas.
It is often difficult to save individual species because? Small populations are more prone to disease. Inbreeding may result in genetic disorders. Captive species may not reproduce in the wild.
Preserving entire ecosystems rather than individual species is a good conservation strategy because? More than one species can be saved.
Where are some of the unique ecosystems of the United States? In the Pacific Northwest and California. In the Florida Everglades and Hawaii.
How did CITES treaty reduce the slaughter of elephants? It banned imports and exports of all ivory worldwide.
An endangered species is? A species in danger of extinction.
Many more species are estimated to exist than the 1.9 million known to science. To which group, do most of the unknown species belong? Insects and fungi
Which would be most effective in slowing the loss of biodiversity? Creating large parks/preserves in biodiversity hotspots.
In what part of the world are the greatest numbers of extinctions occurring? In tropical rain forests.
The International Union for Conservation of Nature and Natural Resources (IUCN)? Is a collaboration of about 200 governmental agencies and 700 private conservation groups from around the world.
The fact that organisms are adapted to survive in particular environments helps to explain why? Habitat destruction accounts for most extinctions.
Reintroducing the in certain areas of the northwestern U.S.? Discourages hunters from hunting other animals.
Which would be be illegal under the Endangered Species Act? Digging up an endangered plant in your backyard and selling it.
Which of the following statements about the California condor is correct? The California condor is the subject of a captive-breeding program.
According to biologists, what percentages of species have become or are expected to become extinct between 1900 and 2100? 25 percent
Germ-plasm banks are unique because they focus on? Preserving animal species.
GERM PLASM IS A conservation strategy.
Reduction in the Sea otter population affected the Pacific coast ecosystem by Decreacing the biodiversity of the ecosystem.
SPECIES CRITICAL TO THE FUNCTIONING OF AN ECOSYSTEM? Keystone species
APPLICATION OF BIOLOGICAL SCIENCE TO CREATE NEW PRODUCTS? Biotechnology
ACTIVITIES SUCH AS CAMPING IN WILDERNESS AREAS Ecotourism
DIFFERENT GENES CONTAINED WITHIN A POPULATION? Genetic biodiversity
LLEGAL HUNTING? Poaching
NUMBER AND VARIETY OF SPECIES WITHIN A GIVEN AREA? Biodiversity
PROGRAM THAT HAS HELPED RETURN THREATENED SPECIES IN THE WILD Captive breeding
VARIETY OF HABITATS AND COMMUNITIES WITHIN ECOSYSTEMS? Ecosystem diversity
SPECIES NATIVE TO A PARTICULAR AREA? Endemic biodiversity
THREATENED AREAS HIGH BIODIVERSITY? Biodiversity hotspots.
Created by: asimien907