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GSCE-Biology > Eco Systems > Flashcards

Eco Systems Flashcards

1
Q

What are Resources

A

What an organism needs to stay alive, oxygen, food, warmth…

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2
Q

What is an ecosystem

A

All the organisms and the environment in which they live

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3
Q

What is a Community

A

All the organisms that live in an ecosystem

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4
Q

What is Interdependent

A

The way organisms rely on each other for resources

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5
Q

What is a habitat

A

Where an organism lives

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6
Q

What is an Abudance

A

A measure of how common something is

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7
Q

What is a food web

A

A diagram showing the feeding relationship between organisms

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8
Q

What are the resources used by plants

A

Light, Water, CO2, O2, Warmth, mineral ions

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9
Q

What are the resources used by animals

A

Food, Oxygen, Water, Warmth, Shelter

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10
Q

How do you calculate population size

A

Number of organism x
(Total size of area where organism lives/ total area)

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11
Q

What is biomass

A

Mass of tissue

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12
Q

Why is energy lost when an animal eats another animal

A

Some energy lost to heating the animal, some in its faeces

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13
Q

What is a Parasitic relationship

A

Parasite lives on a host, parasites benefit by feeding of off a live host

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14
Q

What is a Trophic relationship

A

Predator prey, one eats the other (Feeding)

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15
Q

What is a Mutualistic relationship

A

Both benefits (Give and take)

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16
Q

Why is fish farming bad

A

too many in small spaces can cause parasite to spread easily, which means fish need to be treated carefully

17
Q

What does Indigenous mean

A

Native

18
Q

What is Eutrophication

A

Adding more nutrients to an ecosystem

19
Q

How can Eutrophication result in low oxygen levels in the water

A

Excess fertilisers enters stream, causing algae to bloom on surface of stream blocking sunlight getting to the plants so they can’t photosynthesise, which means plants decompose, and bacteria use up oxygen during respiration, resulting in less oxygen

20
Q

What are two adaptations of fleas

A

Sharp claws to grip onto hair and skin,
Eggs are glued to hair to prevent them falling of

21
Q

What are two adaptations of Worms

A

Male and female sex organs
Flat bodies for fast diffusion

22
Q

What is food security

A

Having enough access to safe and healthy food at all times

23
Q

What are agricultural inputs

A

Artificial additions to agriculture, like fertilisers

24
Q

What is reforestation

A

Trees are planted after they have been chopped down

25
Q

What are field margins

A

Strips of land where wild plants and animals can live

26
Q

What do hedgerows and field margins do

A

They preserve biodiversity

27
Q

Bloodworms have a high level of haemoglobin in their blood.
Give a reason why this helps them survive in polluted water.

A

haemoglobin binds oxygen /
increases the rate of diffusion /
polluted water is low in oxygen

GSCE-Biology (27 decks)

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