Forests and other ecosystems may decrease the chances of flooding in an area due to their water-holding capacity.
Rosy periwinkle, the nine-banded armadillo, and some species of fungus and bacteria have _________ value to man.
C. consumptive use
Depletion of the ozone layer will lead to increased crop production and enhanced immune systems.
_______ is (are) associated with 85% of the cases of threatened and endangered species.
B. Habitat loss
E. Exotic species
The use of wheat, corn, rice and other crops derived from wild ancestors is an example of the _______ value of biodiversity.
C. consumptive use
D. climatic regulation
aB. Habitat loss
5 Multiple Choice Questions
E. All of the choices are correct.
C. acid rain or snow.
D. A, B, and C are correct.
A. The edge effect
5 True/False Questions
A _______ population survives in unfavorable conditions, has a birthrate that barely equals the death rate, and receives new members from other fragmented populations.
E. source → B. source
Biodiversity "frontiers" are areas that
A. have high rates of extinction.
B. lack diversity.
C. have many more species than formerly thought.
D. are replacing native species with exotic species.
E. are fragile in comparison with other ecosystems. → D. A, B, and C only are correct.
Biodiversity is described in terms of genetic, community, and landscape diversity.
True False → True
The effect of global warming on coral reefs is
A. negligible, since they will be protected underwater.
B. minor since all marine environments are moderated by the great ability of water to hold temperatures constant.
C. negative, since a rise of a few degrees will cause them to bleach and become lifeless.
D. positive, since the higher temperatures will increase photosynthesis in the mutualistic algae.
E. positive, since the greater sunlight to penetrate the sea will increase photosynthesis in the mutualistic algae. → C. negative, since a rise of a few degrees will cause them to bleach and become lifeless.
When the factors causing habitat decline are identified and a procedure is developed to remedy this, it is
A. the edge effect.
B. a habitat restoration plan.
C. a population viability analysis.
D. a gap analysis.
E. landscape dynamics. → E. metapopulation.