221.

Which one of the following is considered important in the development of seed habit?

• Homospory

• Heterospory

• Dependent sporophyte

• Free living gametophyte

• Free living gametophyte

The residual persistent nucellus in the seed of black pepper and beet is called

• Perisperm

• Endosperm

• Pericarp

• Scutellum

• Scutellum

Consider the following statements with respect to flowering plants

(A) The pollen grains represent the male gametes

(B) The functional megaspore developing into the embryo sac represent the female gamete

(C) Transfer of pollen grains from anther to the stigma of different plant is known as xenogamy

(D) Transfer of pollen grains from anther to the stigma of another flower of the same plant is known as geitonogamy

Of the above statements

• (A) and (B) alone are correct

• (A) and (C) alone are correct

• (A) and (D) alone are correct

• (B) and (C) alone are correct

• (B) and (C) alone are correct

Water pollinated plants have

• Bright colour

• Fragrance

• Nectar

• Tassels

• Tassels

Monocotyledonous seed consists of one large shield shaped cotyledon called

• Coleoptile

• Testa

• Tegmen

• Hilum

• Hilum

Consider the following statements with respect to pollen grains

(a) The exine is a thin and continuous layer made up of cellulose and pectin

(b) The hard outer layer called the exine is made up of sporopollenin

(c) Sporopollenin is present ingerm pores

(d) The exine exhibits a fascinating array of patterns and designs

Of the above statements-

• (a) and (b) alone are correct

• (a) and (c) alone are correct

• (b) and (d) alone are correct

• (b) and (c) alone are correct

• (b) and (c) alone are correct

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

• Zygote develops into embryo

• Central cell develops into endosperm

• Ovules develop into embryo sac

• Ovary develops into fruit

What is the fate of the male gametes discharged in the synergid?

• All fuse with the egg

• One fuses with the egg, other(s) fuse(s) with synergid nucleus.

• One fuses with the egg and other fuses with central cell nuclei.

• One fuses with egg other(s) degenerate (s) in the synergid.

Persistent nucellus in the seed is known as

• Perisperm

• Hilum

• Tegmen

• Chalaza

Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is

• Axile

• Parietal

• Free central

• Basal