Ecology Test

Factors that limit population size are either density-dependent or density-independent.  Below are a mix of factors that will affect population size.  Put the following factors into their correct category.

Groups:

(a) Density-Dependent

,

(b) Density-Independent

• Human Activities

• Parasitism

• Predation

• Earthquakes

• Competition

Tags

HS-LS1-C-1

HS-LS2-A-1

What is the approximate carrying capacity of the population? 

• 500

• 2500

• 2000

• 1500

Tags

HS-LS2-A-1

3. What is most likely to happen when the human population reaches its carrying capacity?

• Competition for resources will begin

• The human population will follow a cyclical pattern

• A crash will take place in the human population

• The population will grow at a slower rate

Tags

HS-LS2-A-1

The graph below is an example of which of the following? (Select all that apply.)

• carrying capacity

• exponential growth

• logistic growth

• density-dependent limiting factor

• density-independent limiting factor

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HS-LS2-A-1

The following natural events will cause primary succession to occur:

• Floods and hurricanes

• Wildfires and controlled burns

• Tsunamis and tornadoes

• Glacier movement and volcanoes

Tags

HS-LS2-C-1

Which of the following describes a population that is likely to experience exponential growth?

• A new population of bacteria in the soil of a recently cultivated farmland

• An established population of fish in a heavily fished lake

• A native population of bobcats in a densely forested area

• A native species of bird in a protected wildlife reserve

Tags

HS-LS2-A-1

An island in a lake in New York has a population of mice. In one year, the population density changed from 12 mice per 25 square meters to 20 mice per 25 square meters. Which factor most likely caused the change in the density of mice on the island?

• A decrease in the amount of precipitation

• Migration of snakes to the island

• Competition among mice for food

• A decrease in the island’s owl population

Tags

HS-LS2-A-1

Which of the following would result in a graph similar to the one below? Select all that apply

• birth rate > death rate

• birth rate < death rate

• birth rate = death rate

• immigration > emigration

• immigration < emigration

Tags

HS-LS2-A-1

The population of beetles shown in the graph  is decreasing because of ___________________ factors. 

• Density-Dependent

• Density-Independent

Tags

HS-LS2-A-1

When a population reaches carrying capacity, birth rate ​ (a)   ​ death rate. 

​

Tags

HS-LS2-A-1