Response to Stimulus

Q.

Question 10
The movement of the shoot towards light is

(a) geotropism
(b) hydrotropism
(c) chemotropism
(d) phototropism

Q. Identify the part of the plant that shows positive geotropism.

1. 
2. 
3. 

Q.

Question 37
In Figure (a), (b) and (c), which appears more accurate and why?

Q.

The stimulus received by an organism from its external environment.

Q.

Question 5
Design an experiment to demonstrate hydrotropism.

Q. The central nervous system consists of ____.

1. only spinal cord
2. brain and nerves
3. spinal cord and nerves
4. brain and spinal cord

Q.

The growth of a tendril in pea plants is due to

1. Effect of light

2. Effect of gravity

3. Effect of touch

4. Effect of water

Q. The peripheral nervous system includes nerves originating from the brain and spinal cord.

Q.

Central nervous system comprises of:

1. Brain

2. Spinal cord

3. Vertebral column

4. All peripheral nerves

Q. What does central nervous system consist of? What does it control? [2 MARKS]

Q. _____________ detects a stimulus.​

Q.

Match the following:

A	B
1.Sunflower	i. Chemotropism
2.Tree roots	ii. Hydrotropism
3.Tomato roots	iii.Phototropism
4.Roots away from acids	iv.Geotropism

​

1. 1-ii, 2-iii, 3-iv, 4-i

2. 1-iii, 2-iv, 3-ii, 4-i

3. 1-iv, 2-i, 3-ii, 4-iii

4. 1-iv, 2-iii, 3-i, 4-ii

Q. Identify the part of the plant that shows positive geotropism.

1. 
2. 
3. 

Q. Neurosis is characterised by prolonged emotional reaction to a given stress.

1. True
2. False

Q. The movement of plant organs in response to unilateral effect of light is known as

1. Geotropism
2. Thigmotropism
3. Hydrotropism
4. Photototropism

Q. Plants too show response to stimulus like humans.

1. True
2. False

Q. The movement of stem against the gravity is called .

1. +ve geotropism
2. -ve phototropism
3. +ve geotropism
4. -ve geotropism

Q. The movement of stem against the gravity is called .

1. +ve geotropism
2. -ve phototropism
3. +ve geotropism
4. -ve geotropism