Question 6

Which of the following is not an example of response to a stimulus?
(a) Watering in mouth when we see delicious food items.
(b) Closing of leaves of Mimosa plant when touched.
(c) Shutting our eyes when an object is suddenly thrown in our direction.
(d) A chick hatching out of an egg.

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Solution

Option (d).

All of us respond immediately to the changes in our surroundings. Changes in our surroundings that make us respond to them are called stimuli. A chick hatching out of an egg is a natural phenomenon of reproduction in hens. It requires a particular time period and temperature to occur. Hence it is not a response to stimuli.

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Question 6

Which of the following is not an example of response to a stimulus?
(a) Watering in mouth when we see delicious food items.
(b) Closing of leaves of Mimosa plant when touched.
(c) Shutting our eyes when an object is suddenly thrown in our direction.
(d) A chick hatching out of an egg.

The closing of leaves of Mimosa plant (lajwanti) when touched is an example of:

Q. When we touch Mimosa, our touch acts as ______ for the plant and it closes its leaves in return.

Q. Assertion : "Touch" responses in Mimosa is an example of such movement.
Reason : Nastic movements occur in the direction of stimulus.

Choose the correct statements:

Statement 1: We see objects when light emitted from the objects enter our eyes.

Statement 2: We see objects when light reflected from the objects enter our eyes.

Statement 3: Eyes alone cannot see an object.

Statement 4: Eyes emit light rays in all direction.

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