Day 53: CBSE Class 10 Science

1. A.
   Both plants are kept in the dark room for three days before placing them in separate glass jars.
2. B.
   Both plants are covered with separate wooden bell-jars.
3. C.
   Use vaseline to seal the bottom of the jars with the glass plates.
4. D.
   Both potted plants were kept in sunlight for a few hours before the iodine test for the presence of starch.

Tap an option to check your answer.

1. A.
   The guard cells have shrunk.
2. B.
   The water comes out of the guard cells.
3. C.
   Large amount of water is lost through stomata.
4. D.
   The guard cells have swelled due to inflow of water.

Tap an option to check your answer.

1. A.
   By eating the bread on which it is growing.
2. B.
   By using nutrients from the bread to prepare their own food.
3. C.
   By breaking down the nutrients of bread outside the body and then absorbing them.
4. D.
   By allowing other organisms to grow on the bread and then consuming them.

Tap an option to check your answer.

1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

Tap an option to check your answer.