HMH UNIT 1 TEST

A penguin population is near the carrying capacity of its ecosystem. If the population density of penguins were to increase, what direct effect would it most likely have?

• There would be more food available to the penguins.
• The penguin population would die off immediately.
• The penguins would have greater competition for resources.
• There would be a decrease in the number of predators of penguins.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A caterpillar population feeds almost exclusively on a single species of plant. The carrying capacity of the caterpillars population is dependent primarily on food availability. Recently, a fire destroyed 80% of the plants that the caterpillars feed upon. What will the carrying capacity of the caterpillars be reduced to?

• 20%
• 80%
• .02%
• .08%

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A mountain lion population has a negative population growth rate. Which of these conditions must also be true for the population growth rate to be negative?

• Births + deaths < immigrations + emigrations
• Births + deaths > immigrations + emigrations
• Births + immigrations < deaths + emigrations
• Births + immigrations > deaths + emigrations

Tags

NGSS.HS-LS2-2

A population of owls experiences a period of exponential growth. Which of these factors would be a density-dependent limiting factor that could decrease the carrying capacity of the ecosystem for this population of owls?

• A competing species moves into the forest
• A period of lower than normal rainfall
• A developer fills in a wetland to build an office park
• High winds knock down a quarter of the trees

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which statement regarding factors affecting the deer population is supported by the data in the graph?

• From 1920 to 1924, competition for limited resources managed the deer population.
• From 1915 to 1920, predation managed the deer population.
• From 1925 to 1930, resource scarcity was the most influential factor on the changing deer population.
• From 1925 to 1930, lack of competition for resources was the most influential factor on the changing deer population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In an ecosystem, which of the following factors would most likely increase the carrying capacity of herbivores such as rabbits or mice?

• an increase in the number of carnivores in the ecosystem
• a decrease in the amount of precipitation in the ecosystem
• an increase in the number and variety of plants available in the ecosystem
• a decrease in the amount of sunlight that the ecosystem receives

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Describe the the trends for each population in the graph below and explain WHY they change over time in this way.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Name one ABIOTIC factor that could lower the carrying capacity of an ecosystem for herbivores (plant eaters) and explain HOW that might occur.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Examine the graph below, then respond in paragraph form. Your answer should include: A) The type of (Exponential or Logistic) growth pictured; B) An explanation of HOW you know it is the type of growth you claim it is; and, C) A prediction of what you would expect to happen to the environment if this trend continues and WHY you would expect this to happen.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-1

When a population grows past the ecosystem's carrying capacity, what happens to the population?

• Continues to grow
• The population starts to die off to return to carrying capcity
• The population will go extinct due to lack of resources
• The population grows then finds a new carrying capacity

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4