5 Written questions
5 Matching questions
- Biodiversity is a resource of immense value. All of the following are ways in which biodiversity is directly valuable to humans EXCEPT
C. consumptive use.
D. contributions to biogeochemical cycles.
- 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
- Rabbits were introduced to Australia by pioneer settlers in the mid 1800s for sporting hunters. They have since stressed native marsupial and plant populations. This is an example of the introduction of exotic species through accidental transport.
- Which of the following statements about biological diversity is NOT true?
A. Scientists estimate that 10-50 million species exist.
B. Biodiversity is described in terms of genetic, community, and landscape diversity.
C. Biodiversity refers to the variety of life on Earth.
D. Biodiversity is evenly distributed throughout the biosphere.
E. Many species that are in danger of extinction have not been identified and studied.
- Each year, both forests and prairie grasslands are burned by fires, some started by lightning strikes and others caused by humans. However, many grasses are fire-adapted or dependent upon occasional fires to maintain their prairie system. Some pine trees are so dependent upon fire that they cannot propagate without it. Does this contradict our concerns about air pollution and carbon dioxide and carbon monoxide levels in the atmosphere?
A. Yes; fire is detrimental and further research should be done to correct the apparent biological adaptations that contradict eliminating all fires possible.
B. Yes; fire is detrimental in natural environments and these apparent adaptations are artificial situations due to human distortion of natural systems.
C. No; the environmental concerns listed in the text are all extremist concerns with no basis in factual data.
D. No; as with all complex systems, it is a matter of proportion; the current trend towards atmospheric pollution is far beyond the Earth's normal low level of natural fires, the effects of which were easily handled.
- a True
- b D. No; as with all complex systems, it is a matter of proportion; the current trend towards atmospheric pollution is far beyond the Earth's normal low level of natural fires, the effects of which were easily handled.
- c D. Biodiversity is evenly distributed throughout the biosphere.
- d D. contributions to biogeochemical cycles.
- e A. agricultural
5 Multiple choice questions
- E. All of the choices are correct.
- B. Habitat loss
- C. bioinformatics.
- 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. sink
The Everglades ecosystem
A. no longer receives water from natural sources as in the past and is drying out.
B. contains sawgrass prairie and mangrove sloughs.
C. has diverse bird, wildlife, and growing seasons
D. A, B, and C are correct.
E. B and C only are true. → C. a natural phenomenon due to absorption of sunlight and re-radiating of the heat.
Preliminary studies indicate that biodiversity maximizes resource acquisition and retention within an ecosystem.
True False → True
The situation with major oceanic fishing areas is
A. good, since the oceans are so large, they are the one remaining natural ecosystem that is not susceptible to extinction.
B. generally positive, with only one or two of the 15 major oceanic fishing areas over-exploited.
C. generally negative, with 11 of the 15 major oceanic fishing areas overexploited.
D. positive for the bottom dwellers that are protected but negative for the schools of swimming fish.
E. negative for the bottom dwellers that are over-fished by trawling but positive for the schools of swimming fish that can easily get away. → C. negative, since a rise of a few degrees will cause them to bleach and become lifeless.
Forests and other ecosystems may decrease the chances of flooding in an area due to their water-holding capacity.
True False → True