what is ecology

organisms and environmental factors

Organisms are individual living things. They range from microscopic bacteria to gigantic blue whales (see Figure must be obtained from the environment. Biotic factors are all of the living or once-living aspects of the environment. They include all the organisms that live there as well as the remains of dead organisms. Abiotic factors are all of the aspects of the environment that have never been alive. They include factors such as sunlight, minerals in soil, temperature, and moisture.

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levels of organization in ecology

Ecologists study organisms and environments at several different levels, from the individual to the biosphere. The levels are depicted in Figure 23.2 and described below. For a video introduction to the levels of organization in ecology, click on this link: . MEDIA Click image to the left or use the URL below. URL: An individual is an organism, or single living thing. A population is a group of individuals of the same species that live in the same area. Members of the same population generally interact with each other. A community is made up of all the populations of all the species that live in the same area. Populations in a community also generally interact with each other.

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instructional diagrams

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questions

All organisms have the same basic needs.

-->  a. true

b. false

Environmental factors can be classified as either biotic or abiotic.

-->  a. true

b. false

An individual is a single living thing.

-->  a. true

b. false

Members of the same population rarely interact with each other.

a. true

-->  b. false

The biotic component of a biome is a community.

a. true

-->  b. false

An ecosystem includes only biotic factors.

a. true

-->  b. false

The biosphere includes all the other levels of organization in ecology.

-->  a. true

b. false

__individual living thing

a. abiotic factor

-->  b. organism

c. community

d. biotic factor

e. ecosystem

f. biome

g. population

__any living or once-living aspect of the environment

a. abiotic factor

b. organism

c. community

-->  d. biotic factor

e. ecosystem

f. biome

g. population

__group of similar ecosystems

a. abiotic factor

b. organism

c. community

d. biotic factor

e. ecosystem

-->  f. biome

g. population

__group of individuals of the same species that live in the same area

a. abiotic factor

b. organism

c. community

d. biotic factor

e. ecosystem

f. biome

-->  g. population

__any aspect of the environment that has never been alive

-->  a. abiotic factor

b. organism

c. community

d. biotic factor

e. ecosystem

f. biome

g. population

__all the biotic and abiotic factors in an area and their interactions

a. abiotic factor

b. organism

c. community

d. biotic factor

-->  e. ecosystem

f. biome

g. population

__all the populations of all the species that live in the same area

a. abiotic factor

b. organism

-->  c. community

d. biotic factor

e. ecosystem

f. biome

g. population

Ecology shares data and theories with the science(s) of

a. geography.

b. biology.

c. climatology.

-->  d. all of the above

What do all living things need from their environment?

a. sunlight

b. energy

c. matter

-->  d. two of the above

Biotic factors in the environment include

-->  a. remains of dead organisms.

b. minerals in the soil.

c. temperature.

d. two of the above

An ecosystem consists of

a. biotic factors.

b. abiotic factors.

c. a community.

-->  d. all of the above

Ecosystems in a biome have the same general

a. consumers.

-->  b. abiotic factors.

c. populations.

d. all of the above

Which choice shows levels of organization in ecology from smaller to larger?

a. individual ! community ! population

-->  b. ecosystem ! biome ! biosphere

c. community ! biome ! ecosystem

d. population ! ecosystem ! community

Abiotic factors in the environment include all of the following except

-->  a. organic wastes.

b. moisture.

c. temperature.

d. minerals.

diagram questions

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