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Biology > Biology section 7 Knowledge organizer > Flashcards

Biology section 7 Knowledge organizer Flashcards

1
Q

What is the order of the food chain

A

producer
primary consumer
secondary consumer
tertiary consumer

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2
Q

What are the steps of the predator-prey cycles

A

prey population increases
more food available for predators
their population increases
then leads to decrease in prey
then decrease in predators
which then leads to the cyle to restart

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3
Q

List biotic factors

A

Availability of food
New predators arriving
New pathogens
One species outcompeting another

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4
Q

List abiotic factors

A

Light intensity
Temp
moisture levels
oxygen
wind
co2
soil ph. ,mineral content

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5
Q

What are the three adaptations

A

Structural Adaptation
Functional
Behavioural

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6
Q

What is structural adaptation

A

Part of the body that helps the organism survive

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7
Q

What is functional adaptation

A

How the body operates that helps the organism survive

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8
Q

What is behavioural adaptations

A

A behaviour that helps the organism survive

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9
Q

What are the carbon cycle steps

A

photosynthesis
respiration
decay
combustion

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10
Q

What are the water cycle steps

A

Evaporation
Condensation
precipitation

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11
Q

Three ways to maintain biodiversity

A

Breeding programmes for endangered species
Reduction of deforestation
Recycling resources

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12
Q

What is the purpose of random sampling

A

Estimate the size of a population in an area

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13
Q

What is the method for Random sampling

A
  1. choose an amount of quadrats
    2.assign coordinates to the area
    3.randomly choose coordinates
  2. place quadrats and count organisms present
  3. calculate mean
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14
Q

What is the purpose of systematic sampling

A

See how populations and communities change over a distance

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15
Q

What is the method for systematic sampling

A
  1. use a tape measure to create the transect
    2.put quadrats at set distances
    3.Count organisms present
    4.repeat in different place/time of year
    5.draw graphs to see the change over a distance
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16
Q

Why does the human activity of () happen

A
17
Q

Why does the human activity of (polluting water with fertiliser and sewage) happen

A

Farmer spread fertiliser on fiels. rain washes it into rivers and ponds. sewage is realsed directly into rivers

18
Q

Why does the human activity of (Using land) happen

A

Humans construct buildings, create quarries and farms.

19
Q

Why does the human activity of (Destroying peat bogs) happen

A

Human use peat to provide compost to increase food production

20
Q

Why does the human activity of (Deforestation) happen

A

To provide land for cattle and rice fields. to grow crops for biofuels

21
Q

Why does the human activity of (producing acidic gases) happen

A

Combustion of fossil fuels release sulfur dioxide and nitrogen oxides. these gases dissolve in water making it acidic

22
Q

Why does the human activity of (polluting water with toxic chemicals) happen

A

Pesticides and other toxic chemicals are wahsed into rivrs and lakes by rain

23
Q

Why does the human activity of (increasing temp of the planet) happen

A

Humans release extra greenhouse gasse into the atmosphere and less co2 is absorbed by plants through photosyntisis. Greenhouse gases absorb heat and stop it escaping to space

24
Q

What are the effects of the human activity(Polluting water with fertiliser and sewage)

A

Fertilisers and sewage cause an increase in growth of algae. When the algae die, they are decomposed by bacteria that use oxygen. Other animals die due to a lack of oxygen. This is called Eutrophication​

25
Q

What are the effects of the human activity()

A

Habitat for plants and animals is reduced

26
Q

What are the effects of the human activity()

A

Removes habitat, reducing biodiversity. Decay or burning of peat produces co2. this contributes to global warming

27
Q

What are the effects of the human activity()

A

Burning or decomposing trees releases CO2. Fewer trees to remove CO2 from the atmosphere. This contributes to global warming. Loss of biodiversity.

28
Q

What are the effects of the human activity()

A

Acid rain. Damages plants. Can cause rivers and lakes to become acidic, killing animals and plants.

29
Q

What are the effects of the human activity()

A

Toxic chemicals accumulate in animals. The further up the food chain, the greater the accumulation. Top predators die or fail to breed.

30
Q

What are the effects of the human activity()

A

Toxic chemicals accumulate in animals. The further up the food chain, the greater the accumulation. Top predators die or fail to breed.

Biology (6 decks)

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