Assertion Reason Questions of Class 10 Science Chapter 7 Control and Coordination PDF Download

Free PDF Download of CBSE Class 10 Science Chapter 7 Control and Coordination Assertion Reason Questions for Class 10 Science. Assertion and Reason Questions for Class 10 Science with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 10 Science Control and Coordination to know their preparation level.

Control and Coordination Class 10 Assertion Reason Questions

The following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below:
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct

Assertion: Suppression of growth of auxiliary buds is called apical dominance.
Reason: It is due to the effect of the downward movement of Auxin from the apical region towards the lower side.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


Assertion: Phototropism is a directional growth movement.
Reason: It occurs in the direction of light.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


Assertion: Plants lack the nervous system, but they do coordinate.
Reason: It is so because of hormones

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


Assertion: Cytokinins are present in the highest concentration in fruits and seeds.
Reason: Cytokinins are responsible for promoting cell division.

(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.


Assertion: Abscisic acid is responsible for wilting of leaves.
Reason: It is a growth inhibitor.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


Assertion: Medulla oblongata causes reflex actions like vomiting, coughing and sneezing.
Reason: It has many nerve cells which control autonomic reflexes.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


Assertion: Males have more stature than females during puberty.
Reason: This is because of the presence of thyroxin in the blood of females.

(c) Assertion (A) is true but reason (R) is false


Assertion: Phototropism is caused by auxin.
Reason: When light is coming from one side of the plant, auxin diffuses towards the shady side of the shoot.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


Assertion: Gibberellins induce internodal growth in dwarf plant varieties.
Reason: Gibberellins when applied to normal plants, it increases the length of the plant.

(c) Assertion (A) is true but reason (R) is false


Assertion: Abscisic acid is a stress hormone.
Reason: Stimulation of ABA occurs in adverse conditions.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.


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