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S3 Biology > Key Area 2: Distribution Of Organisms > Flashcards

Key Area 2: Distribution Of Organisms Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

What is biotic

A

Living factors

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2
Q

How is the distribution of organisms affected?

A

Biotic and Abiotic factors
Competition, disease and food availability

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3
Q

What is abiotic

A

Non-living variables

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4
Q

What are the 5 main biotic factors

A

Competition, disease, food availability, grazing, predation

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5
Q

What are the 4 abiotic factors

A

Light intensity, moisture, pH, temperature

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6
Q

What is sampling used for

A

To gather data about an ecosystem

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7
Q

Name an error when using a light meter

A

Creating a shadow

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8
Q

What is a light meter used for

A

Light intensity

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9
Q

What is a soil moisture metre used for

A

Moisture

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10
Q

What is a source of error when using a soil moisture metre

A

Cross-contamination

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11
Q

What is a pH meter used for

A

Measuring pH

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12
Q

What is a thermometer used for

A

Temperature

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13
Q

What is a source of error when using a pH meter

A

Cross-contamination

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14
Q

What is a source of error when using a thermometer

A

Not giving it enough time

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15
Q

What is used to sample plants

A

Quadrat

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16
Q

What do you have to do with the quadrat

A

Place it randomly
Repeat

17
Q

What is a pitfall trap used for

A

Small invertebrates

18
Q

How to use a pitfall trap

A

Level with the ground
Make it camouflaged
Make holes at the bottom for water drainage

19
Q

What are keys used for

A

Identifying unknown organisms

20
Q

What are the two keys

A

Branched and paired statement

21
Q

3 reasons to preserve biodiversity

A

Food sources, raw materials, aesthetic value

22
Q

Human influences affect ?

A

Biodiversity

23
Q

What is an indicator species

A

A species that by it’s presence or absence indicates levels of pollution

24
Q

What do lichens indicate

A

Air quality

25
Q

What do freshwater invertabraes indicate

A

Water quality

26
Q

How can you minimise creating a shadow with a light meter

A

By moving out the way

27
Q

How can you minimise cross-contamination when using a moisture meter or pH meter

A

Clean the probe

28
Q

How can you minimise errors when using a thermometer

A

Give it time

29
Q

What type of organism can be sampled using a quadrat

A

Slow-moving animals

30
Q

Why do we repeat results?

A

To make results more accurate

31
Q

What happens when grazing is low/high

A

Biodiversity will be low

S3 Biology (6 decks)

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