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In ecology, the passing of nutrients from one animal or plant to another, progressing from the simplest to the most complex organisms is a food ...
According to Gause's competitive exclusion principle, in a given community, two species cannot simultaneously occupy the same ecological ...
Which noun cannot be appropriately applied to plants?
The algae make food used by the fungus. The fungus absorbs moisture providing water for the algae. This symbiosis results in a composite organism called a ...
Consumers include ...
A. all plants and all animals
B. some plants and some animals
C. some plants and all animals
D. all plants and some animals
E. all animals and no plants
Jeremy Rifkin described this creature that eats its way through 900 pounds of vegetation every month as a hoofed locust that has despoiled American streams and desertified sub-Saharan Africa. What is the more common name for this animal?
The Water Budget
Which expresses the ratio of the world's fresh water to salt water?
A. 2.5% to 97.5%
B. 4.5% to 95.5%
C. 6.5% to 93.5%
D. 8.5% to 91.5%
E. 10.5% to 89.5%
What do ecologists call the first organisms, such as lichen and mosses, to inhabit an area?
Adaptive radiation is the development of different species from a common ancestor. It is primarily dependent on ...
A. the search for food
B. a low predator population
C. the principle of isolation
D. a great variety of habitats
E. a sustained rate of mutations
Place these in food chain order beginning with a producer.
2. wild turkey
All autotrophs ...
A. are bipedal
B. feed on carrion
C. have a nervous system
D. carry out photosynthesis
E. lack cellular differentiation
What is the net change in a population density given this data?
immigration = 50
mortality = 20
emigration = 30
natality = 10
One feature that characterizes both tundra and deserts is ...
A. midlatitude locations
B. the absence of mammals
C. relatively low precipitation
D. a short annual growing season
E. high average annual temperatures
tropical rain forest
What biome covers just six percent of the Earth's surface but contains half of the world's species?
Each organism occupies a particular trophic level in a food chain. Moving from one trophic level to the next involves an energy loss of about ...
What is the monster in this passage?
In Iowa, where the black loam used to stretch
like a carpet from horizon to horizon, you top
a hill and find the brown claw marks of a monster
that has scoured off the land's precious mantle.
Which author argued that the indiscriminate use of herbicides and insecticides constitutes a hazard to wildlife and humans?
A. Ayn Rand
B. Pearl Buck
C. Harper Lee
D. Rachel Carson
E. Margaret Mitchell
In ecological succession, one plant or animal community is replaced by another over time. What is the name for the biological community that becomes dominant at the end of a succession?
Which region includes the greatest number of different biomes?
A. African veldt
B. Baja peninsula
C. Tibetan plateau
D. island of Hawaii
E. isthmus of Panama
The Food Chain
An organism which eats venison or beef is a ...
D. first order consumer
E. second order consumer
The maximum population that an environment can support indefinitely is its carrying ...
The greatest amount of food per acre is produced in the ...
C. marine biome
E. rain forest
Just to the north of the tropic of Cancer and to the south of the tropic of Capricorn is a world-wide biome. What kind of biome is it?
The appearance of new insect varieties that are resistant to insecticides is an illustration of ...
B. natural selection
C. adaptive radiation
D. ecological succession
E. inheritance of acquired traits
man (homo sapiens)
It took 1700 years for this number to double since the year 1 A.D. Then it doubled again in 200 years and doubled again in the next 100 years. The present doubling time is 35 years. These statistics refer to the world's population of what organism?
A Different Worldwide Web
Assume that rabbits feed entirely on shrubs and foxes eat the rabbits. What would result if the foxes died?
A. The rabbits would not be affected.
B. The shrubs would decrease.
C. The rabbits would quickly decrease.
D. The shrubs would increase.
E. The rabbits would become shrubs.
It has been estimated that a layer of organic debris about 12 miles thick would now cover the Earth if not for what group of organisms that break down dead plant and animal matter?
Predator populations and types of decomposers are biotic environmental factors. Which is an abiotic environmental factor?
A. common flora
B. availability of prey
C. presence of microbes
D. abundance of species
E. average precipitation
water, carbon dioxide
In the carbon cycle, what two substances are used by producers to build the organic compounds that make up their bodies?
Scientists estimate that about 85% of the Earth's photosynthetic activity is carried out ...
A. by trees
B. in savannas
C. by phytoplankton
D. by herbaceous plants
E. in tropical rain forests
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Answers to Ecology
8. pioneer organisms
14. tropical rain forest
18. climax community
25. man (homo sapiens)
29. water, carbon dioxide
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