SB5A

The population of mice in a local forest ecosystem has recently died out due to disease. In the past, these mice were the main predators of the forest beetles. What is the best prediction about what will happen to the beetles?

• The drop in the mouse population will lead to a drop in the beetle population.

• The drop in the mouse population will lead to no change in the beetle population.

• The drop in the mouse population will lead to an increase in the beetle population.

• The increase in the mouse population will lead to an increase in the beetle population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In an ecosystem, which is NOT a density-dependent limiting factor?

• predation

• parasitism

• competition

• natural disaster

Tags

NGSS.MS-LS2-4

Choose the letter than correctly answers the question.

Which of the these is shown from the smallest to the largest?

• organism, population, community, ecosystem, biosphere

• biosphere, ecosystem, community, population, organism

• population, ecosystem, community, organism, biosphere

• community, ecosystem, biosphere, population, organism

Which of the following statements describes density-independent limiting factors?

• Competition is an example.

• Environmental extremes, such as a hurricane or drought, are examples.

• Their effects increase as the population increases in an area.

What is a group of individual organisms that belong to the same species?

• Community

• Ecosystem

• Biome

• Population

If two species of organisms occupy the same niche ____________

• one will find a new habitat.

• competition will be very intense.

• both organisms will become extinct.

• both will need to enlarge their habitat.

What impact do the amounts of available energy, water, and oxygen have on an

ecosystem?

• They are used as nutrients by living organisms.

• They recycle the residue of dead organisms.

• They control the environment's energy source.

• They act as limiting factors on the organisms.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What do tropisms NOT allow a plant to do?

• respond to light

• respond to gravity

• respond to water sources

• respond to sound

Look at the image

• gravitropism

• phototropism

• thigmotropism

• rapid response

Tags

NGSS.MS-LS1-5

Alligators will use their powerful feet, tail, and snouts to dig a hole through the mud, producing small ponds known as "alligator holes." Many other species benefit from alligator holes. During the dry season, fish, turtles, and other aquatic animals live in the alligator holes. Birds, terrestrial animals, and plants use these holes as a source of water. What term best describes the role of alligators in this ecosystem?

• invasive exotic species

• keystone species

• producer

• primary consumer

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4