Introduction to Ecology

What determines where a population can live?

• whether its needs are met by the biotic factors in the habitat

• whether its needs are met by the abiotic factors in the habitat

• whether its needs are met by the abiotic and biotic factors in the habitat

• whether its needs are met by the other populations in the habitat

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In a desert ecosystem, sand is an example of a(n)______________ factor.

• biotic

• abiotic

• ecosystem

• community

A cactus is an example of a(n) ________________factor.

• biotic

• abiotic

• habitat

• niche

Populations of sharks, along with shells and water are included in an ocean ____________________.

• niche

• community

• habitat

• ecosystem

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Which sphere of the Earth includes all living organisms?

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

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A population is ____________________________.

• a group of different species living in the same area.

• a group of individuals of the same species living in separate areas.

• a group of different species living in separate areas.

• a group of individuals of the same species living in the same areas.

Which is an abiotic factor in this ecosystem?

• fish

• rocks

• snails

• plants

Two animal species almost never occupy the same niche within an ecosystem.

• true

• false

A niche is an animal's job in the ecosystem.

• true

• false

An ecosystem relies on both predator and prey to survive.

• true

• false

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