Biology (B2)

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What are the groups to classify organisms? (7)
Kingdom, Phylum, Class, Order, Family, Genus, Species
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What does nitrifying bacteria do in the nitrogen cycle?
Converts the ammonia to nitrates
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What does denitrifying bacteria do in the nitrogen cycle?
Converts the nitrates to nitrogen gas
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What does nitrogen-fixing bacteria do in the nitrogen cycle?
Lives in the root nodules fix nitrogen gas.
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Describe the nitrogen cycle
Plants take in nitrogen (as nitrates) from soil to make protein. Feeding passes nitrogen along the food chain. The nitrogen compounds in dead animals and plants are broken down by decomposers and returned to the soil.
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What is interspecific competition?
Competition between organisms of different species.
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What is infraspecific competition?
Competition between organisms of the same species.
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What is counter-current heat exchange?
Warm blood enters the flippers, warms up the cold blood leaving to stop it cooling the blood.
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What are the three types of pollution that cause the most concern?
Carbon dioxide (increase greenhouse effect and global warming), CFC's (destroying the ozone), sulphur dioxide (causing acid rain)
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How can pollution be measured?
Pollution can be measured by the amount and different organisms that live in the area.
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Why do people think conservation is important?
It can protect our food supply, prevent plants and animals that might be useful for medical uses, protect organisms and habitats that people enjoy to visit.
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What is sustainable development?
Taking enough resources from the environment for current needs while leaving enough for the future and preventing permanent damage.
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What do predators do?
Organisms that eat each other.
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What is mutualism?
When organisms gain from each other.
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What are parasites?
Organisms that feed off each other.
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What does the recycling of carbon involve?
Photosynthesis, feeding, respiration and decomposition.
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Examples of natural selection.
warfarin resistance in rats, antibiotic resistance in bacteria and frequency of colour in peppered moths.
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What is natural selection?
Natural selection is the adaptation for survival.
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Other cards in this set

Card 2

Front

What does nitrifying bacteria do in the nitrogen cycle?

Back

Converts the ammonia to nitrates

Card 3

Front

What does denitrifying bacteria do in the nitrogen cycle?

Back

Preview of the front of card 3

Card 4

Front

What does nitrogen-fixing bacteria do in the nitrogen cycle?

Back

Preview of the front of card 4

Card 5

Front

Describe the nitrogen cycle

Back

Preview of the front of card 5
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