Chapter 3 Test A: Question Preview (ID: 2596)

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The lowest level of environmental complexity that includes living and nonliving factors is the
a) ecosystem
b) community
c) biosphere
d) biome

Plants are
a) omnivores
b) producers
c) consumers
d) herbivores

Ehich ecological inquiry method is an ecologist using when he or she enters an area periodically to count the population numbers of a certain species?
a) experimenting
b) observing
c) modeling
d) questioning

The total amount of living tissue within a given trophic level is called the
a) biomass
b) energy mass
c) trophic mass
d) organic mass

The movements of energy and nutrients through living systems are different because
a) energy forms chemical compounds and nutrients are lost as heat.
b) ev=cergy flows in one direction and nutrients recycle.
c) nutrients flow in one direction and energy recycles.
d) energy is limited in the biosphere and nutrients are always available.

Investigating a pond, you note that snails in the pond have thin, weak shells. This is most likely the result of a(an)
a) oxygen deficiency
b) calcium carbonate deficiency
c) phosphorus definciency
d) ammonia deficiency

An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)
a) autotroph
b) consumer
c) detritivore
d) heterotroph

The repeated movement of water between Earth\'s surface and the atmosphere is called
a) the condesation cycle
b) the water cycle
c) evaporation
d) precipitation

Most of the energy available to a consumer trophic level is used by organisma for
a) performing photosynthesis
b) respiration, movement, and reproduction
c) transfer to the next trophic level
d) producing inorganic chemical compounds

Nitrogen fixation is carried out primarily by
a) plants
b) bacteria
c) humans
d) consumers

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