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Changes in Ecosystems

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

Relationship where one organism benefits but the other is harmed

a)

competition

b)

predation

c)

mutualism

d)

parasitism

e)

commensalism

2.

Relationship where both organisms benefit

a)

competition

b)

predation

c)

mutualism

d)

parasitism

e)

commensalism

3.

Relationship where one organism benefits and the other neither benefits nor is harmed

a)

competition

b)

predation

c)

mutualism

d)

parasitism

e)

commensalism

4.

___________ succession occurs when an area is re-colonized following a disturbance and soil remains.

a)

primary

b)

secondary

c)

tertiary

5.

Two organisms fight for the same resource

a)

competition

b)

predation

c)

mutualism

d)

parasitism

e)

commensalism

6.

What type of population growth does this graph represent?

a)

exponential

b)

logistic

c)

carrying capacity

7.

Density - _____________ factors are affected by the number of individuals; examples include competition, predation, and parasitism.

a)

dependent

b)

independent

8.

One organism catches and eats another organism

a)

competition

b)

predation

c)

mutualism

d)

parasitism

e)

commensalism

9.

What type of population growth does this graph represent?

a)

exponential

b)

logistic

c)

carrying capacity

10.

__________________ is the maximum number of individuals an ecosystem can support.

a)

exponential

b)

logistic

c)

carrying capacity

11.

What are the four stages of ecological succession in order from the beginning to end?

a)

pioneer, establishing, sustaining, producing

b)

pioneer, establishing, producing, sustaining

c)

producing, establishing, sustaining, producing

d)

sustaining, pioneer, producing, establishing

12.

Relationship where both organisms benefit

a)

competition

b)

predation

c)

mutualism

d)

parasitism

e)

commensalism

13.

Density- ______________ factors are environmental factors that limit a population’s growth; examples include weather events and human activities.

a)

dependent

b)

independent

14.

___________ succession occurs when newly exposed rock is colonized for the first time (there is no soil).

a)

primary

b)

secondary

c)

tertiary

15.

The first plants that establish an area are known as ____________ species.

a)

establishing

b)

sustaining

c)

pioneer

d)

producing