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  • Created by: Baharekh
  • Created on: 21-06-15 15:38
How do arctic animals adapt to reduce heat loss?
1) Small surface area 2) Thick layer of fur/blubber 3) Camouflage
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How do desert animals adapt to save water & keep cool?
1) Large surface area 2) Thin layer of body fat 3) Camouflage
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Where do camels keep all their fat?
Humps
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How do desert plants adapt to live with little water?
1) deep roots to access underground water 2) Spines to reduce water loss 3) Small surface area
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What do plants compete for?
Light, space, water, nutrients
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What do animals compete for?
Territory, food, water, mates
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What are 2 living factors of environmental change?
1) A change in numbers of predators 2) A change in numbers of prey
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What are 2 non-living factors of environmental change?
1) A change in average temp 2) Change in average rainfall
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How can air pollution be monitored?
Looking at types of lichen that are sensitive to the concentration of sulphur dioxide in the atmosphere
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What does lots of lichen & mayfly larvae indicate?
Clean air
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What do lots of rat-tailed maggots & sludgeworms indicate?
Very high level of water pollution
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What decreases as you go up pyramids of biomass?
Energy & biomass
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What is the main source of energy?
Sun
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In what conditions do microorganisms work best in?
Warm & moist
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What elements do plants take from the soil & air?
Carbon, oxygen, hydrogen, nitrogen
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What is the carbon cycle ‘powered’ by?
Photosynthesis
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How is CO2 removed from the atmosphere by?
Green plants & algae
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How is carbon returned to the atmosphere?
When plants, algae & animals respire
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What happens when plants, algae & animals die?
Microorganisms feed on them
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What is another way that CO2 is released back into the air?
Combustion
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What are 2 types of variation?
Genetic & environmental
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What are gametes?
Sex cells which the offspring develops from
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What does the nucleus contain?
Genetic material in the form of chromosomes
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How many chromosomes does the human cell contain?
23 pairs
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What do chromosomes carry?
Genes
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What are different versions of the same genes called?
Alleles
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What is sexual reproduction?
Male & female gametes combined to produce offspring containing a mixture of their parents genes
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What is asexual reproduction?
Involves one parent (cloning)
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Other cards in this set

Card 2

Front

How do desert animals adapt to save water & keep cool?

Back

1) Large surface area 2) Thin layer of body fat 3) Camouflage

Card 3

Front

Where do camels keep all their fat?

Back

Preview of the front of card 3

Card 4

Front

How do desert plants adapt to live with little water?

Back

Preview of the front of card 4

Card 5

Front

What do plants compete for?

Back

Preview of the front of card 5
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