Home
Class 11
BIOLOGY
Assertion: The trichomes in the shoot sy...

Assertion: The trichomes in the shoot system are usually multicelluler.
Reason: The trichomes help in preventing water loss due to evaporation.

A

If both assertion and reason are true and reason is the correct explanantion of assertion

B

if both assertion and reason are true but reason is not the correct explanation of assertion.

C

if assertion is true but reason is false.

D

if both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B

The stem epidermal hairs are called trichomes. The trichomes in the shoot system are usually multicellular. They may be branched or unbranched and soft of stiff. They may even be secretory. The trichomes help in preventing water loss due to transpiration.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : The air buble shines in water. Reason : Air bubble in water shines due to refraction of light.

Assertion and Reason. Mark the correct choice as : Assertion: There is danger of a vehicle skidding on a wet road. Reason:The tyres of the vehicle lose their grip on the road due to increase in friction due to presrnce of water on the road..

Assertion: Bile helps in emulsification of fat. Reason: Bile salts help in incorporating fatty acids and glycerol into water soluble droplets called chylomicrons.

Assertion: DDT concentration is more in fish eating birds than the actual concentration of aquatic system. Reason: This is due to a phenomenon called Biomagnification.

Assertion: Aquatic herbivores are usually more productive as compared to terrestrial herbivores. Reason: Phytoplanktons achieve faster growth rate and more nutritious to heterotrophs than their terrestrial counterparts due to their small size and lack of structural tissues.

Assertion : Surgical methods of contraception help to prevent implanation . Reason : They are barrier methods .

Assertion: Skin ofleech is kept moist and slimy. Reason : It is due to secretion of mucus which also prevents it from drying

Assertion (A) : Water is not essential for fertilization in Angiosperms. Reason (R ) : Pollen tube helps in fertilization, so water is not essential for fertilization

Assertion : The difference in shapes of leaves produced in air and those produced in water in buttercup represent the heterophyllous development due to environment. Reason : The phenomenon of heterophylly is an example of plasticity.

Assertion : Auxins help to prevent fruits and leaves droo at early stages. Reason : Auxins promote the abscission of older mature leaves and fruits.