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

Which gas can be collected over water?

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.

Aquatic plants like water hyacinth and water lily are pollinated by…………..

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.

Study the following statements and select the correct option. (i) Tapetum nourishes the developing pollen grains. (ii) Hilum represents the junction between ovule and funicle. (iii) In aquatic plants such as water hyacinth and waterlily, pollination occurs by water. (iv) The primary endosperm nucleus is triploid.

Assertion : A plant cell bursts if placed in water. Reason : High turgor pressure causes bursting of plant cells.

Find out correct order of vegetative propagules of plants like Potato , Ginger , Agave , Bryophyllum and Water Hyacinth

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A,B and C, but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted ? Can you assign the correct label to each assuming the river water is relatively clean ?

Is it possible to consider vegetative propagation observed in certain plants like Bryophyllum, water hyacinth, ginger, etc., as a type of asexual reproduction? Give two/three reasons.