Ecology Test Review

List the organizational levels (ecosystem, biosphere, population, community) of a biological system from smallest to largest.

• ecosystem, population, community, biosphere

• biosphere, population, community, ecosystem

• community, biosphere, ecosystem, population

• population, community, ecosystem, biosphere

How do microorganisms affect the soil in the nitrogen cycle?

• They release the nitrogen in the soil into the atmosphere

• They eat nitrogen and are harmful to the soil

• They absorb atmospheric nitrogen through nitrogen fixation and make it usable for plants

• They produce the nitrogen needed by the soil

Tags

NGSS.MS-LS2-3

Which of the following describes a mutualism relationship?

• One animal benefits, the other is unaffected

• Both animals benefit

• One animal benefits, the other is harmed

Tags

NGSS.MS-LS2-2

Which of the following describes a commensalism relationship?

• One animal benefits, the other is unaffected

• Both animals benefit

• One animal benefits, the other is harmed

Which of the following describes a parasitism relationship?

• One animal benefits, the other is unaffected

• Both animals benefit

• One animal benefits, the other is harmed

What is a limiting factor?

• The number of organisms that an environment can support

• A toxin that builds up in the organisms at the top of a food chain

• The maximum amount of energy an organism can consume

• A scarce resource that prevents a population from growing larger

Why are plants called producers in food chains?

• They produce the most offspring in ecosystems

• They produce the most amount of waste

• They produce food through photosynthesis

• They produce 90% of the heat in the atmosphere

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

At what point during ecological succession will an ecosystem have the greatest amount of species diversity?

• At the beginning

• As a climax community

• In the seral stages

• In the pioneer stage

Which level of a trophic pyramid has the most energy available?

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

Tags

NGSS.MS-LS2-3

Which organisms on this food web are producers?

• Rabbits, grasses, birds

• foxes, owls, birds

• carrots, grasses, grains

• grains, owls, grasses

Tags

NGSS.MS-LS2-3