Home
Class 12
BIOLOGY
Assertion : Hydrophily constitues a majo...

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.

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:
d
Hydrophily is the made of pollination (transfer of pollen grains from the mature anther of a flower to the stigma of another flower) which is accomplished through the agency of water. Pollination by water is quite rare in flowering plants and is limited to only about 30 genera, mostly monocotyledons e.g. Vallisneria, Zostera, Ceratophyllum, etc. in may aquatic plants with emergent flowers, pollination occurs by wind or insects, e.g., lotus , water lily, water hyacinth, etc.
Promotional Banner

Similar Questions

Explore conceptually related problems

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.

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

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.

Assertion:Leaves of monocot plants generally possess reticulate venation. Reason:Leaves of dicot plants generally, possess parallel venation.

Assertion : Self-incompatibility is a genetic mechanism which prevents self-pollination and thereby fertilisation by inhibiting either pollen germination or pollen tube growth in the pistil. Reason : In gametophytic self-incompatibility, the incompatibility reaction is determined by the genotype of the sporophytic tissue of the plant from which the pollen is derived.

Double fertilisation in an angiosperms plant means (a) fusion of two egg cells with two male gametes (b) fusion of egg cell twice with male gametes (c) fusion of one male gamete with the egg cell and the other male gamete with the synergid (d) fusion of one male gamete with the egg cell and the other male gamete with secondary nucleus

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.