Question

Pick the correct match for seed dispersal

List I	List II
A. Anemochory	1.Water
B.Hydrochory	2.Animals
C.Autochory	3.Self
D.Zoochory	4.Wind

(a) A-4,B-1,C-3,D-2
(b) A-1,B-2,C-3,D-4
(c) A-4,B-2,C-1,D-3
(d) A-2,B-3,C-1,D-4

Answer 1

Hint: Seed dispersal is the method of spreading seeds away from the parent plant body. As a plant is stationary, it requires the help of various agents for its dispersal. These agents can be biotic or abiotic.

Complete answer:
The abiotic agents include wind and water. Seed dispersal by wind is known as anemochory. It is one of the most primitive ways by which a plant disperses its seeds. The aquatic plants usually and some terrestrial plants growing in the vicinity of water bodies employ the use of water for seed-dispersal. This phenomenon is known as hydrochory. When biotic agents are involved in seed-dispersal, the process is collectively called zoochory. Several plants like Geranium do not take help from any external agents to disperse their seed. This limits their reach of germination and thus places of growth.

Additional Information: -Anemochorous plants produce seeds that are light and feathery. They bear a modified calyx known as pappus surrounding the corolla. It helps in the flight of seeds and its stability in the air. These are usually members of the Asteraceae family.
-Water-pollinated plants have fruits that are adapted for floating with a fibrous and porous mesocarp. The epicarp of the fruit is also spongy and water-proof.E.g. Lotus.
-For plants to disperse their seeds by animals, they bear attractive and sweet fruits like mango or tomato. In some, spines or hooks are present on the seeds so that they can be attached to the animal’s body. E.g Xanthium
So, the correct answer is ‘ A-4,B-1,C-3,D-2.’

Note: -Seeds are the product of sexual reproduction in a plant and thus they generate new genetic variation leading to variations.
-Dehydration and dormancy of mature seeds are crucial for the storage of seeds, which can be used in the next season to raise crops.