Question 1

Which changes the carrying capacity of the ecosystem?

Accepted Answer

Ecological succession

Answer

Occurrence of typhoon

Answer

Stability of ecosystem

Answer

Increase in insect population

Question 2

Which BEST describes carrying capacity?

Accepted Answer

Maximum number of species that can be supported by an ecosystem

Answer

Number of organisms living together in an area

Answer

Types of organisms that can be supported by an ecosystem

Answer

Factors like food, shelter, and energy used by the number of species in an ecosystem

Question 3

Assume that there are 3400 butterflies of a specific species living in the forest. What do the 3400 butterflies mean?

Accepted Answer

Population Size

Answer

Number of species

Answer

Carrying Capacity

Answer

Population Growth

Question 4

It is observed that the population growth of an organism increases rapidly when the population size is below carrying capacity. Which part of the graph shows this observation?

Accepted Answer

Year A to B

Answer

Year A to C

Answer

Year B to D

Answer

Year B to C

Question 5

What happened to the population size from years B to C?

Accepted Answer

Decline

Answer

Steady

Answer

Increase

Answer

Nothing happens

Question 6

What is most likely to happen when a species of fish is introduced in a river?

Accepted Answer

The population of native fish decreases because they have a new competitor to the resources.

Answer

The population of introduced fish increases rapidly.

Answer

The introduced fish becomes the native fish in the river.

Answer

The number of introduced fish in the river will not survive.

Question 7

The population size of rats in the field increased and exceeded its carrying capacity. What is the impact of this on the ecosystem?

Accepted Answer

Scarcity of resources

Answer

Increase in carrying capacity of an ecosystem

Answer

Stable competition among the rats

Answer

Increase in the number of prey

Question 8

Why does population growth decline when population size reaches the carrying capacity of the ecosystem?

Accepted Answer

Death rate increases due to scarcity of resources.

Answer

Organisms with a high population is easy to be found by predators

Answer

The ecosystem has the factors that limit population growth

Answer

Birth rate decreases due to climate change.

Question 9

What is the possible impact of the declining number of native trees in the forest ecosystem?

Accepted Answer

Decrease in the shelter of native birds and other animals.

Answer

Other organisms depending on native trees will look for other alternatives in the forest.

Answer

Increase the resiliency of the forest.

Answer

Other plants will have more food.

Question 10

Which is NOT needed to maintain the carrying capacity of the ecosystem?

Accepted Answer

Strong winds

Answer

Climate

Answer

Native organisms

Answer

Resources

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