Free Sexual Reproduction In Flowering Plants (Monthly Quiz: 2) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Product of sexual reproduction generally generates:

(a) Prolonged dormancy

(b) Large biomass

(c) New genetic combination leading to variation

(d) Longer viability of seeds

Question-2

The viability of seeds is tested by

(a) 2, 6 dichlorophenol indophenol

(b) DMSO

(c) 2, 3, 5 triphenyl tetrazolium chloride

(d) Safranine

Question-3

When pollen of a flower is transferred to the stigma of another flower of the same plant, the pollination is referred to as

(a) autogamy

(b) xenogamy

(c) geitonogamy

(d) allogamy.

Question-4

Which of the following is correct in reference to animal pollinated plants?

(a) Rodents, lizards and primates are also pollinators in some species.

(b) Butterflies, flies, beetles, wasps, ants, moths and bats are common pollinating agents.

(c) Animal pollinated plants are specifically adapted for particular species.

(d) All the above

Question-5

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

(a) One fuses with the egg and other fuses with central cell nuclei.

(b) All fuse with the egg.

(c) One fuses with the egg, other(s]degenerates in the synergid.

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

Question-6

Which is correct?

(a) Gametes are invariably haploid

(b) Gametes are generally haploid

(c) Spores are invariably haploid

(d) Both spores and gametes are invariably haploid

Question-7

Double fertilization is characteristic of

(a) angiosperms

(b) gymnosperms

(c) pteridophytes

(d) bryophytes

Question-8

In angiosperms, microsporogenesis and megasporogenesis

(a) form gametes without further divisions

(b) occur in anther

(c) involves meiosis

(d) occur in ovule

Question-9

Seeds are adaptively important because

1. they maintain dormancy.
2. they protect young plants during vulnerable stages.
3. they store food for young plants, and facilitate dispersal.

Identify the correct reasons.

(a) (i) and (iii)

(b) (i) and (ii)

(c) (ii) and (iii)

(d) All of the above

Question-10

What is observed in a normal flower which opens and exposes the stigma and anther?

(a) Complete autogamy is rare

(b) Autogamy is absent

(c) Always autogamous

(d) Always xenogamous

Question-11

Apomictic embryos in Citrus arise from

(a) synergids

(b) antipodal cells

(c) maternal sporophytic tissue in ovule

(d) diploid egg

Question-12

Which of the following statements are correct for a typical female gametophyte of a flowering plant?

1. It is 8-nucleate and 7-celled at maturity.
2. It is free-nuclear during the development.
3. It is situated inside the integument but outside the nucellus.
4. It has an egg apparatus situated at the chalazal end.

(a) (i) and (iv)

(b) (i) and (ii)

(c) (ii) and (iii)

(d) (ii) and (iv)

Question-13

Wind pollination is common in

(a) Legumes

(b) Grasses

(c) Lilies

(d) Orchids

Question-14

Which one of the following is correct for yucca plant?

(a) The moth deposits an egg in the locule of ovary of yucca plant.

(b) Moth species and yucca plant cannot complete their life cycles without each other.

(c) The larva of the moth came out of the eggs as the seed starts developing of yucca

(d) All the above

Question-15

In angiosperms, pollen tube liberate their male gametes into the

(a) central cell

(b) egg cell

(c) antipodal cells

(d) synergids

Question-16

The endosperm of gymnosperms is

(a) triploid

(b) diploid

(c) haploid

(d) polyploid

Question-17

Haploid plant cultures are got from

(a) leaves

(b) pollen grain

(c) root tip

(d) buds

Question-18

Read the following statements.

1. Double fertilisation was discovered by Nawaschin in Lilium and Fritillaria.
2. The total number of nuclei involved in double fertilisation is five.
3. The central cell of embryo sac, as a result of triple fusion becomes primary endosperm cell (PEC).
4. Synergids are haploid.

Choose the correct set of statements.

(a) II and IV

(b) I, II and III

(c) I, III and IV

(d) I, II, III and IV

Question-19

Vegetative propagation in Pistia occurs by

(a) stolon

(b) runner

(c) offset

(d) sucker.

Question-20

Plants with ovaries having only one or a few ovules are generally pollinated by

(a) Birds

(b) Butterflies

(c) Wind

(d) Bees