ECOSYSTEMS Flashcards

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1
Q

what is an ecosystem?

A

A community of animals, plants and microorganisms, together with the habitat where they live.

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2
Q

what is a habitat?

A

the place where an organism lives

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3
Q

what is a community?

A

all the living organisms in an ecosystem

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4
Q

what is a population?

A

All of the members of a single species that live within a geographical area.

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5
Q

what is a species?

A

a group of organisms which can interbreed to produce fertile offspring

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6
Q

what is biodiversity?

A

the degree of variation that exists among all living organisms on Earth

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7
Q

what is a producer?

A

a green plant which makes its own food by photosynthesis

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8
Q

what is a consumer?

A

an organism which eats other organisms to gain energy

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9
Q

what is a predator?

A

An animal which hunts, kills and eats other animals

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10
Q

what is a prey?

A

an organism that predators kill for food

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11
Q

what is a omnivore?

A

an animal which eats both plants and animals

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12
Q

what is a carnivore?

A

an animal which eats other animals (secondary consumer)

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13
Q

what is a herbivore?

A

an animal which eats plants only (primary consumer)

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14
Q

what does a food chain show?

A

the flow of energy between organisms

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15
Q

what does a food web show?

A

the energy flow through interconnected food chains in an ecosystem

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16
Q

what do the arrows in a food chain or web show?

A

direction of energy flow

17
Q

what is a niche?

A

the role an organism plays in a community

18
Q

when does competition occur?

A

when their niches overlap (they both try to use the same resource and the resource is in short supply)

19
Q

what is inter specific competition?

A

The competition which occurs between organisms of different species for a common resource.

20
Q

what is intra specific competition?

A

The competition between organisms within the same species.

21
Q

what does a niche relate to?

A

allow more than one species access to a limited resource

22
Q

what is biomass?

A

The mass of living material