Top answers

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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What is the subjunctive used for?

The subjunctive is used in situations of disblief, desire, fear, or regret and uses certain expressions such as 'Il faut que' or 'J'ai peur que'. The verbs can be in different tenses, such as present, or per...
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Answered by Stephanie H. • French tutor
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