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

333.

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