Bd Bio Ch 4-2

Front 1

Organisms in ecosystems are influenced by both biological, or ______, and physical, or _______, factors.

Back 1

biotic
abiotic

Front 2

V. These factors include all the living things with which organisms interact.

Back 2

Biotic factors

Front 3

V. These factors include temperature, soil type, and other nonliving factors.

Back 3

Abiotic factors

Front 4

V. The area where an organism lives

Back 4

habitat

Front 5

A habitat includes _____ factors.

Back 5

both biotic and abiotic

Front 6

V. This consists of all the physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.

Back 6

A niche

Front 7

This includes what an organism eats and how it gets its food.

Back 7

a niche

Front 8

Organisms in communities may interact in one of three ways:

Back 8

competition,
preda-tion,
or symbiosis.

Front 9

Competition occurs when organisms try to use the ____ resources, or necessities of life.

Back 9

same

Front 10

Competition often results in one organism ____ out.

Back 10

dying

Front 11

V. This principle states that no two species can occupy the same niche in the same habitat at the same time.

Back 11

competitive exclusion principle

Front 12

V. This occurs when one organism (the predator) captures and eats another (the prey).

Back 12

Predation

Front 13

V. This occurs when two species live closely together in one of three ways: mutualism, commensalism, or parasitism.

Back 13

Symbiosis

Front 14

V. When both species benefit from the relationship.

Back 14

mutualism

Front 15

V. When one species benefits and the other is neither helped nor harmed.

Back 15

commensalism

Front 16

V. When one species benefits by living in or on the other and the other is harmed.

Back 16

parasitism

Front 17

As an ecosystem ____, older inhabitants gradually die out and new organisms move in.

Back 17

ages

Front 18

V. The series of predictable changes that occurs in a community over time.

Back 18

ecological succession

Front 19

V. This occurs on bare rock surfaces where no soil exists.

Back 19

Primary succession

Front 20

V. The first species to live in an area of primary succession.

Back 20

pioneer species

Front 21

V. This occurs when a disturbance changes a community without removing the soil.

Back 21

Secondary succession

Front 22

V. This term refers to any necessity of life, such as water, nutrients, light, food, or space.

Back 22

Resource