EASY
10th CBSE
IMPORTANT
Earn 100

The changes that are likely to happen in the plant in the following picture:

Question Image

(A) A hormone abscisic acid is synthesised at the shoot tip.

(B) When light is coming from one side of the plant, auxin diffuses towards the shady side of the plant.

(C) Abscisic acid helps the cells to grow longer.

(D) Cells grow longer on the side of the shoot which is away from light.

Select the correct option.

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Important Questions on Control and Coordination

EASY
10th CBSE
IMPORTANT
A growing seedling is kept in a dark room. A burning candle is placed near it for a few days. The top part of seedling bends towards the burning candle. This is an example of :
MEDIUM
10th CBSE
IMPORTANT

Match the columns.

1. cerebrum a. controls reflex action
2. spinal cord b. takes messages from the brain
3. brain stem c. controls thinking
4. motor nerve d. controls balance
5. cerebellum e. controls involuntary muscle
MEDIUM
10th CBSE
IMPORTANT
If the cerebellum is not functioning properly, what are the activities of our body affected?
MEDIUM
10th CBSE
IMPORTANT

Match of the following:

Column 1 Column 2
A. Synapse (i) Cyton
B. Neuron (ii) Cerebral peduncles
C. Hindbrain (iii) Synaptic cleft
D. Midbrain (iv) Pons
MEDIUM
10th CBSE
IMPORTANT
When a person is suffering from severe cold, he or she cannot
HARD
10th CBSE
IMPORTANT

Match the terms of column I with those of column II.

Column I Column II
(A) Olfactory receptors (1) Tongue 

(B) Thermoreceptors (temperature receptors)

(2) Eye
(C) Gustatoreceptors (3) Nose
(D) Photoreceptors (4) Skin
HARD
10th CBSE
IMPORTANT
A neuron consists of (1), (2) and (3). The (1) contains most of the cell organelles except (4). The (2) conduct nerve impulses to the (1). (3) vary in length and can measure anything from a few mm to a meter. Most neurons are surrounded by a white insulating sheath called (5). Between the segments of (5) are gaps called the (6). The (3) has a swollen end called bulb that stores a chemical called (7).
HARD
10th CBSE
IMPORTANT
Assertion (A): The spinal nerves are 31 pairs in number.
Reason (R): Spinal nerves only have sensory neurons in them.