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In a nerve cell, the site where the electrical impulse is converted into a chemical signal is known as :
Distinguish between hormonal co-ordination in plants and animals.
Which part of the brain is responsible for - (1) intelligence (2) riding a bicycle (3) vomiting (4) controlling hunger
How is brain and spinal-cord protected against mechanical injuries ?
What are tropic movements ? Give an example of a plant hormone which (1) inhibits growth and (2) promotes cell division.
Explain directional movement of a tendril in pea plant in response to touch. Name the hormone responsible for this movement.
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