Biology Key Word Definitions (N)

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What is the natural classification system?
Classification system based on the similarities between different living organisms.
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What is natural selection?
The process by which evolution takes place. Organisms produce more offspring that the environment can support so only those which are most suited to their environment - the 'fittest' - will survive to breed and pass on their useful characteristics.
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What is negative pressure?
A system when the external pressure is lower than the internal pressure.
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What is a nerve?
Bundles of hundreds or even thousands of neurons.
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What is net movement?
The overall movement of......
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What is a neuron?
A basic cell of the nervous system which carries minute electrical impulses around the body.
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What is nitrate ion?
Ion which is needed by plants to make proteins.
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What does non-renewable mean?
Something which cannot be replaced once it is used up.
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What is the nucleus of a cell?
An organelle found in many living cells containing the genetic information.
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Card 2

Front

What is natural selection?

Back

The process by which evolution takes place. Organisms produce more offspring that the environment can support so only those which are most suited to their environment - the 'fittest' - will survive to breed and pass on their useful characteristics.

Card 3

Front

What is negative pressure?

Back

Preview of the front of card 3

Card 4

Front

What is a nerve?

Back

Preview of the front of card 4

Card 5

Front

What is net movement?

Back

Preview of the front of card 5
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