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S3 Biology > Key Area 1: Ecosystems > Flashcards

Key Area 1: Ecosystems Flashcards

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1
Q

What is an ecosystem?

A

An ecosystem consists of all organisms living in a particular habitat and the non-living components in which they interact

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2
Q

What is a population

A

The number of organisms present in an ecosystem of 1 species

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3
Q

What is a habitat

A

Where an organism lives

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4
Q

What is a community

A

All the populations in an ecosystem

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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 a producer

A

These are green plants that make their own food using photosynthesis

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7
Q

What is a consumer

A

These are organisms that eat plants and/or animals to obtain energy

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8
Q

What is a herbivore

A

An organism that eats only plant matter

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9
Q

What is a carnivore

A

An organism that eats only meat/animals

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10
Q

What is an omnivore

A

An organism that eats plants and animals

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11
Q

What is the definition of biodiversity

A

The range of different organisms present in an ecosystem, a biome or the whole planet

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12
Q

What is a predator

A

An organism which hunts and eats prey

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13
Q

What is a prey

A

An organism that is hunted and eaten by a predator

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14
Q

Organisms in an ecosystem are linked by …

A

Food chains

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15
Q

What does a food chain show

A

The direction of the energy transfer from organism to organism

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16
Q

What is a food chain

A

Shows the feeding relationship between a producer, primary consumer, secondary consumer and so on

17
Q

What is a food web

A

Shows the interconnection of several feeding relationships

18
Q

What is a niche

A

An organisms niche is the role that it plays within a community

19
Q

What are a niches interaction with other organisms examples

A

Competition, predation and condition it can tolerate (temp)

20
Q

What would animals compete for

A

Food, water, shelter, mates

21
Q

What would plants compete for

A

Sunlight, space, nutrients, water

22
Q

What does an intraspecific competition involve

A

Competition between the same species

23
Q

What does an interspecific competition involve

A

Competition between different species

24
Q

Why is intraspecific competitions more intense

A

They fight for the same resources

25
Q

What does a food chain always start with

A

A producer

26
Q

What is biodiversity

A

The range of different organisms present in an ecosystem, a biome or the whole planet

27
Q

What does a niche relate to?

A

The resources it requires in an ecosystem such as light and nutrient availability

28
Q

When would a competition occur?

A

When resources are short in supply

S3 Biology (6 decks)

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