Free Printable STPM Sem 3 Ch 15 Ecology

Worksheets

STPM Sem 3 Ch 15 Ecology

Total questions: 20

Worksheet time: 10mins

Name

Class

Date

The graph to the right shows the interaction of the wolf and moose populations on Isle Pekie. If the moose population continues to increase, the wolves' food supply will increase. What will most likely happen to the wolf population as a result?

It will decrease.

It will increase.

It will remain the same.

If a disease destroying barley plants in a field swept through an ecosystem, what would happen to the barley eating bird population in the the field ?

The bird population would stay the same

The bird population would infinitely increase

The bird population would decrease

What is the carrying capacity of the graph?

1000

8000

800

600

A scientist was studying a population of fish in a pond over a period of 10 years. He observed that the population increased each year for 3 years, and then remained nearly constant for the rest of the study. The best explanation for this observation is that the population had _____.

stopped reproducing

reached carrying capacity

mutated into a different species

run out of food and all died

Which 2 limiting factors would increase due to the number of individuals in a population (i.e. density-dependent)?

Unusual weather

Natural disaster

Rate of infection

Competition for resources

Which limiting factor is density independent?

competition

disease

natural disasters

If the amount of food or resources available increases, the carrying capacity for an animal:

Stays the same

Increases

Decreases

Fluctuates

The non living parts of an ecosystem

abiotic factors

biotic factors

oxygen

soil

Something that regulates the size of a population is called...

a limiting measure

a limiting factor

carrying capacity

biodiversity

10.

What is the carrying capacity of the graph?

around 500

more than 800

less than 300

around 700

11.

What is interdependent relationship?

A condition that occurs when two or more organisms compete for the same resources within an ecological community

All the biotic and abiotic factors and the interactions among them in a given area

The maximum number of organisms an ecosystem can support

A relationship in which two organisms are mutually dependent on each other for survival

12.

Limiting factors are sometimes helpful because they can keep the population from getting to large.

True

False

13.

Which limiting factor would increase due to the number of individuals in a population (aka; density-dependent)?

Unusual weather

Natural disaster

Disease

14.

^{In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?}

Squirrel Population

Sunlight

Grass available

15.

What term refers to organisms coming into an ecosystem?

emigration

immigration

degradation

population density

16.

This may cause the population of a certain species to decrease.

increase in competition for food

increase of number of predators

introduction of a disease

all of these

17.

Which of the following might result in an increase in the carrying capacity of an ecosystem?

an increase in resources

an increase in predators

an increase in limiting factors

all of these

18.

For the most part, the size of a population depends on _____________.

available resources

food supply

ability to feed offspring

all of these

19.

The ability to reproduce under ideal conditions, enough space, food, water, lack of predators.

Primary Consumers

Pioneer Species

Biotic Potential

Abiotic Factors

20.

The population limit in an ecosystem due to limited resources or predators.

Biodiversity

Biotic factors

Abiotic factors

Carrying capacity

Reset

STPM Sem 3 Ch 15 Ecology

Total questions: 20

Worksheet time: 10mins

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