Ecology - Living Environment Regents Questions

Humans have an effect on ecosystems when they use native grasslands or forested areas for farming or urban use. One negative effect of these changes on the ecosystem is that there will be

• Less biodiversity

• More homes

• Successful economic growth

• Increased food production

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Based on this information, which ecosystem is likely to be the most stable?

• A

• B

• C

• D

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The organisms represented by X are

• Decomposes

• Producers

• Carnivores

• Scavengers

Which list includes only abiotic factors?

• soil, water, air, and sunlight

• ducks, fish, soil, and water

• humidity, temperature, rodents, and grasses

• trees, flowering plants, mosses, and ferns

In order for an ecosystem to remain stable there must be

• drastic modifications to the environment

• interrelationships and interdependencies among organisms

• limited biodiversity

• gradual changes in climate

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Which environmental condition could have causes the change in population size at A?

• a constant availability of shelter

• a decrease in the size of its predators

• an increase in competition

• an unlimited supply of its food

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Many years ago, a volcanic eruption killed many plants and animals on an island. Today the island looks much as it did before the eruption. Which statement is the best possible explanation for this?

• Altered ecosystems regain stability through the evolution of new plant species.

• Destroyed environments can recover as a result of the process of ecological succession.

• Geographic barriers prevent the migration of animals to island habitats.

• Destroyed ecosystems always return to their original state.

Deer ticks are responsible for spreading Lyme disease. This organism, which feeds on the blood of warm-blooded organisms like mice, deer, and humans is best described as

• predator

• scavenger

• parasite

• host

A food chain is represented below

grass > rabbit > hawk

Structures within the rabbit are formed using

• solar energy from the grass

• heat energy lost to the environment

• chemical energy from the hawk

• chemical energy from the grass

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Which human activity would preserve finite resources?

• deforestation

• removing carnivores from a forest

• recycling aluminum

• the production of new species