1) Biodiversity includes which of the following in an ecosystem? a) all nonliving things b) all living things c) only plants and animals d) only rare and endangered species 2) Which of these processes most threatens biodiversity? a) predation b) Earth's orbital cycles c) evolution d) industrial agriculture 3) As a result of the activities shown in the photograph, biodiversity will most likely _________. a) decrease because the natural vegetation has been destroyed b) stay the same because organisms will adapt to new conditions c) increase because crops were planted to replace the forest d) disappear because the organisms there will become extinct 4) Which of the following will most likely be a sustainable environment? a) An environment with a small variety of plants and animal species b) An environment with a large variety of plant and animal species c) An environment with many plant species but with only a few animal species d) An environment with many animal species but with only a few plant species 5) The more diverse an ecosystem is a) the more threatened its populations are b) the more similar the species will be c) the more sustainable it is d) the fewer varieties of species are present 6) Select the best definition of biodiversity. a) the study of plants in a specific ecosystem or habitat b) the variety of life in a specific ecosystem or habitat c) the study of mammals in a specific ecosystem or habitat d) the variety of mammals in a specific ecosystem or habitat 7) Rainforests have _______ than deserts. a) more dunes b) less precipitation c) fewer water sources d) a greater variety of species 8) which succession generally happens faster. a) Primary b) Secondary 9) The final stage of ecological succession in a land ecosystem is a ________. a) Pioneer species b) Primary succession c) Secondary succession d) Climax community 10) Which of the following describes pioneer species? a) large trees that thrive in many climates/ environments b) grasses/ other species that are first to grow in an area c) animals that inhabit an already established ecosystem d) weeds that win competition for space/ sunlight in ecosystem 11) are pioneer species that produce acid that breaks down the rock they are living on a) Weeds b) Spruce c) Lichens d) Algae 12) Identify the true statement. a) Ecosystems never change. b) All succession happens very rapidly. c) Ecosystems are constantly changing. d) Plants and animals can thrive in any environment

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