Sexual Reproduction in Plant (26-04-23)

Perisperm differs from endosperm in

• (a) Having no reserve food

• (b) Being a diploid tissue

• (c) Its formation by fusion of secondary nucleus with several sperms

• (d) Being a haploid tissue

Advantage of cleistogamy is

• (a) More vigorous offspring

• (b) No dependence on pollinators

• (c) Vivipary

• (d) Higher genetic variability

Product of sexual reproduction generally generates:

• (a) Longer viability of seeds

• (b) Prolonged dormancy

• (c) New genetic combination leading to variation

• (d) Large biomass

Consider the following statements and choose the correct option.

A. The ovule is attached to the placenta by means of a stalk called filament.

B. The ovule fuses with the stalk in the region called hilum.

C. The two protective envelopes of ovule are called integuments.

D. The small opening in the tip of ovule is called germ pore.

Of the above statements

• (a) A and D are correct

• (b) A and C are correct

• (c) B and D are correct

• (d) B and C are correct

Egg in female gametophyte is accompanied by

• (a) Antipodal cells

• (b) Synergids

• (c) Definitive nucleus

• (d) Tube nucleus

In angiosperms, microsporogenesis and megasporogenesis

• (a) involve meiosis

• (b) occur in ovule

• (c) occur in anther

• (d) form gametes without further divisions

Male gametophyte in angiosperms produces

• (a) Single sperm and two vegetative cells

• (b) Three sperms

• (c) Two sperms and a vegetative cell

• (d) Single sperm and a vegetative cell

Pollination in water hyacinth and water lily is brought about by the agency of :

• (a) birds

• (b) bats

• (c) water

• (d) insects or wind

The ovule of an angiosperm is technically equivalent to :

• (a) megaspore mother cell

• (b) megaspore

• (c) megasporangium

• (d) megasporophyll

Pollination which occurs in closed condition of flowers is called :

• (a) Allogamy

• (b) Cleistogamy

• (c) Protandry

• (d) Protogyny