Home
Class 12
BIOLOGY
Assertion : Water hyacinth is an invasiv...

Assertion : Water hyacinth is an invasive aquatic plant which speads all over the water in a short period of time.
Reason : Water hyacinth can reproduce vegetatively.

A

If both assertion and reason are true and reason is the correct explanation 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:
a
The aquatic plant 'water hyacinth' is one of the most invsive weeds found growing wherever there is standing water. It drains oxygen from the water, which leads to death of other aquatic forms of life. It can propagte vegetatively at a phenomenal rate and spread all over the water body in a short period of time, hence it is very difficult to get rid off.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Nutrients are required by plants for the synthesis of protoplasm and act as source of energy. Reason : Water provides the medium for enzymatic activities needed for growth.

Why is Water Hyacinth responsible for the death of aquatic plants and animals?

Assertion : Detergents are unbranched hydrocarbons . Reason : It can be used in hard water and as softners .

Assertion (A) : Prawn is an aquatic crustacean Reason (R) : Macrobrachium rosenbergii is used in fresh water culture.

Assertion : Hydrophily constitues a major mode of pollination in most of the aquatic angiospermous plants. Reason : Almost all the aquatic dicot and monocot plants require water for the transport of male gametes and for fertilisation.

Assertion: Rainwater harvesting is to collect and store rain water. Reason: Rain water can be directed to recharge the underground water source.

Assertion(A) : When water is heated up to 100^@C , there is no rise in temperature until all water gets converted into water vapour. Reason : Boiling point of water is 10^@C