Top answers

Biology
GCSE

Why are food chains rarely longer than three or four stages?

A lot of energy is lost at each level

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Answered by Paul W. • Biology tutor
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Define 'biomass'

The dry mass of an organism

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Answered by Paul W. • Biology tutor
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What name is given to the junction of two or more neurones?

Synapse

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Answered by Paul W. • Biology tutor
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What are the three types of neurones in the human nervous system?

Sensory, Motor and Relay neurones

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Answered by Paul W. • Biology tutor
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Of what is the Central Nervous System comprised?

The brain and the spinal cord

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Answered by Paul W. • Biology tutor
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