Question

(a) Draw the structure of a neuron and label the following on it: Nucleus, Dendrite, Cell body and Axon

(b) Name the part of neuron:
(i) where information is acquired.
(ii) through which information travels as an electrical impulse.

OR

(a) What is (i) phototropism and (ii) geotropism? With labelled diagrams describe an activity to show that light and gravity change the direction that plant parts grow in.

(b) Mention the role of each of the following plant hormones:
(i) Auxin
(ii) Abscisic acid

Answer 1

Phototrpism :- trophic movement related to sunlight

Geotropism :- trophic movement related to gravity

Auxin:- growth prmoting hormone in plants . Causes cell elongation

Adscisic acid :- growth inhibiting plant hormone . Cause whilting of leaves

Answer 2

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