Ecosystems And Organisms Question Preview (ID: 34186)


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A goup of land ecosystems with similar climates and organisms is called a(n)
a) energy pyramid
b) climate
c) biome
d) food web

Which biome receives less than 25 cm of rain per year?
a) desert
b) tundra
c) grassland
d) mountain

Which ecosystem is found where the freshwater of a river meets the saltwater of the ocean?
a) estuary
b) neritic zone
c) surface zone
d) rocky intertidal zone

A large variety of plants grow in the tropical rainforest because
a) many insects live there
b) the forest floor is very dark
c) it has very good soil
d) it is warm, humid, and rainy

Which of the following is the biotic factor in a prairie ecosystem?
a) water
b) soil
c) grass
d) sunlight

The smallest unit of ecological organization is a single
a) population
b) ecosystem
c) community
d) organism

The largest population that an environment can support is called its
a) carrying capacity
b) limiting factor
c) birth rate
d) death rate

An organism's particualr role in its habitat, or how it makes its living, is called its
a) carrying capacity
b) ecosystem
c) niche
d) competition

Which statement best explains why few plants grow on a tropical rainforest floor?
a) heavy rains fall throughout the year
b) temperatures in a tropical rainforest stay warm
c) layers of trees keep sunlight from reaching the forest floor
d) many different kinds of animals live on the rainforest floor

the struggle between organisms to survive in a habitat with limited resources is called
a) competetion
b) predation
c) symbiosis
d) parasitism

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