The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

Tags

NGSS.MS-LS2-3

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%
• 90%
• 10%
• 20%

Tags

NGSS.MS-LS2-3

What is a keystone species?

• A species that helps to hold an ecosystem together

• A species that lives in or around rocks

• Keys and stones have nothing to do with ecology

• A keystone isn't a living thing, it's just a stone

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

An organism's _________ is defined as the environment in which it lives.

• habitat
• niche
• social structure
• ecosystem

Tags

NGSS.MS-LS2-4

A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.

• Population
• Community
• Habitat
• Ecosystem

Tags

NGSS.MS-LS2-3

Use the diagram to answer the question.
The trout is a source of food for the human and the eagle. When there are more than one organism vying for the same source we call this____?

• Population
• Resources
• Community
• Competition

Tags

NGSS.MS-LS2-1

animals or plants that other parts of the ecosystem depend on

• prey

• pack

• keystone species

• predators

Tags

NGSS.MS-LS2-4

Identify the process shown in this diagram.

• Extinction
• Toxin Accumulation
• Pollution
• Biomagnification

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The process when concentrations of a harmful substance increases in organisms at higher trophic levels in a food chain or food web.

• Biomagnification
• Predation
• Extinction
• Accumulation

Tags

NGSS.MS-LS2-3

Using pesticides like DDT may cause

• healthier teeth
• Eutrophication in lakes
• no effect
• Biomagnification in a food chain

Tags

NGSS.HS-LS2-7

NGSS.HS-LS4-5