Chapter 21 Question Preview (ID: 42525)


Review Of Chapter 21. TEACHERS: click here for quick copy question ID numbers.

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

The place where an organism lives and that provides the things the organism needs is called its
a) habitat
b) population
c) species
d) community

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

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

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

A close relationship between two species that benefits at least one of the species is called
a) natural selection
b) predation
c) symbiosis
d) adaptations

All of the following are limiting factors EXCEPT
a) food
b) soil
c) space
d) weather conditions

An organism's habitat must provide all of the following EXCEPT
a) food
b) water
c) predators
d) shelter

The nonliving parts of an ecosystem are called
a) populations
b) organisms
c) biotic factors
d) abiotic factors

Which of the following describes an interaction in which one organism kills and eats another?
a) competition
b) symbiosis
c) predation
d) mutualism

All the different populations that live together in an area make up a(n)
a) organism
b) community
c) species
d) ecosystem

The study of how things interact with each other and with their environment is called
a) ecology
b) photosynthesis
c) community
d) biotic factors

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

A group of antelope leaving the herd in search of better grassland is an example of
a) immigration
b) emigration
c) increasing birth rate
d) decreasing death rate

The behaviors and physical characteristics of species that allow them to live successfully in their environment are called
a) habitats
b) limiting factors
c) biotic factors
d) adaptations

To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide and
a) water
b) soil
c) bacteria
d) temperature

Which of the following is an example of a predator adaption?
a) a porcupine's needles
b) a shark's powerful jaws
c) a frog's bright colors
d) a plant's poisonous chemicals

When a flea is living on a dog, the dog is the
a) host
b) parasite
c) predator
d) prey

Mutualism, commensalism and parasitism are the three types of
a) predation
b) symbiotic relationships
c) competition
d) prey adaptations

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