Biology Unit 9 Quiz 1: Principals of Ecology

Which statements reflect dynamic equilibrium of an ecosystem?

- number of existing organisms will reflect changing factors - any change on either side will require a compensation on the other side

Match these items. 1.living place 2.plant eating 3.bacteria 4.used to aid or assist 5.plant or animal

1 - habitat 2 - herbivorous 3 - decomposer 4 - resource 5 - organism

Match these items: 1.microscopic marine plants 2.dependent, competitive 3.organisms and their environment 4.surroundings 5.dynamic equilibrium

1 - phytoplankton 2 - relationships 3 - ecosystem 4 - environment 5 - balance of nature

Everything living depends on something else for its life. (True or False)

True

Habitats vary because environmental factors vary. (True or False)

True

Nothing is free in nature; what is removed must be replaced. (True or False)

True

The ultimate source of energy for physical life on earth is the sun. (True or False)

True

Unnatural occurrences can have the most significant impact on an ecosystem. (True or False)

True

Energy moves through the plants and animals in an ecosystem by way of _____.

a food chain

The basic materials needed for life originate from the ________ environment.

nonliving

Environmental factors may be studied using _________.

space satellites

How do phytoplankton affect the ecosystem of the entire earth?

through the oxygen cycle

Every time people do something to the environment, reactions usually happen as predicted. (True or False)

False

Introducing additional organisms of the same existing kinds will not upset the ecosystem. (True or False)

False

Nature is not balanced as long as a state of dynamic equilibrium exists. (True or False)

False

Only people upset the balance of nature. (True or False)

False

All forms of life on earth are linked together in some type of food relationship. (True or False)

True

Organisms with similar requirements usually compete for environmental factors. (True or False)

True

The state that is ultimately reached which results in balance is called

equilibrium

The diversity of plants and animals on Earth is supported by the numerous kinds of __________ available.

habitats

A habitat that has lots of light and water, a high elevation, low temperature, and a low level of oxygen is most likely a _____ habitat.

high mountain

The word ecology is made up of two Greek words, oikos and logia, and means "_____."

house knowledge

Common needs, mutual benefit, and interactions are all examples of _______.

interdependence