question_answer 25)

  Match the following columns.

Column I		Column II
A.	Aleurone layer	1.	Nutrition
B.	Parthenocarpic fruit	2.	Without fertilization
C.	Ovule	3.	Seed
D.	Endosperm	4.	Double fertilization

Codes ABCD                   ABCD (a) 1    2    3   4                (b) 2    1   4   3 (c) 4   2    13                (d) 2   4    13

Answer:

                  (a) It is the correct sequence of the options in the two columns. Aleurone layer surrounds the tissue of monocot seed and morphologically andbiochemically distinct from seed. It is a protein aceous layer (surrounding theendosperm and separating embryo) which provides nutrition and helps in germination . Parthenocarpic fruit are seedless fruit which develops without the fertilization of egg cell present in the ovule of the plants.                         The ovule cantains the female reproductive unit, i.e., embryo sac that develop into a seed after it is fertilized. Endosperm is formed during the process of double fertilization by the fusion of one male gamete with the two polar nuclei at the centre of the embryo sac.