Which scenario would best allow the long-term survival of a native herbivore in a grassland ecosystem? 

• New producer species immigrates to the ecosystem and increases the diversity of producers. 
• The population size of the herbivore's predators and the grasses they eat remain constant. 
• Humans in the ecosystem reduce the number of predators in the area. 
• A new herbivore that feeds on the same plants immigrates to the ecosystem 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What best describes the type of relationship that occurs between grasshoppers and mice? 

• Commensalism
• Predation
• Mutualism
• Competition

According to the food web, which of the following organisms can be classified into more than one trophic level? 

• grasshopper
• owl
• rabbit
• frog

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Which of the following is abiotic?

• A tree in a forest.

• Wood from the tree on the forest floor.

• A termite on the tree.

• The soil the tree is growing in.

Tags

NGSS.MS-LS2-3

A close, ongoing relationship between species in which at least one is benefiting and the other is not helped or harmed.

• Commensalism

• Symbiosis

• Predator & Prey

• Mutualism

Tags

NGSS.MS-LS2-2

There are birds that eat the food from between the teeth of alligators, leaving the alligators with clean teeth and the birds with a meal. What type of ongoing relationship is this?

• A. Predator & Prey

• B. Mutualism

• C. Commensalism

• D. Parasitism

Tags

NGSS.MS-LS2-2

Energy in an ecosystem is used for growth or lost as __________

• light
• heat
• death
• biomass

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

An organism`s role in its community is its __________, and where it lives is its _________.

• habitat; niche
• role in community; niche
• niche; role in the community
• niche; habitat

What is the ultimate source of energy in an ecosystem?

• The sun

• Producers

• Glucose

• Decomposers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What belongs at the bottom of an energy pyramid?

• Producer

• Predator

• Consumer

• Decomposer

Tags

NGSS.MS-LS2-3