Sexual Reproduction in Flowering Plants Questions — NEET Biology

Q1

Number of meiotic divisions required to produce 200 seeds of Pea

A 200

B 400

C 300

D 250

Correct Answer

Option D

Solution

(d) 200 pollen from 50 MMCs (50 meioses) + 200 megaspore MMCs (200 meioses) = 250 meioses.

Q2

What would be the number of chromosomes in the aleurone layer if synergids have 8 chromosomes?

A 24

B 32

C 8

D 16

Correct Answer

Option A

Solution

(a) Synergids are haploid (n=8); aleurone/endosperm is triploid (3n=24).

Q3

Wind pollination is common in

A legumes

B lilies

C grasses

D orchids

Correct Answer

Option C

Solution

(c) Anemophily (wind pollination) is common in grasses.

Q4

In which one of the following is pollination autogamous?

A Geitonogamy

B Xenogamy

C Chasmogamy

D Cleistogamy

Correct Answer

Option D

Solution

(d) Cleistogamy = autogamous pollination in unopened flowers.

Q5

Filiform apparatus is a characteristic feature of

A suspensor

B egg

C synergid

D zygote

Correct Answer

Option C

Solution

(c) The filiform apparatus is a specialised wall structure in synergids.

Q6

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

A bees

B butterflies

C birds

D wind

Correct Answer

Option D

Solution

(d) Wind-pollinated flowers generally have a single ovule in each ovary.

Q7

Which one of the following statements is wrong about pollen viability?

A When pollen is shed at two-celled stage, double fertilization does not take place.

B Vegetative cell is larger than generative cell.

C Pollen grains in some plants remain viable for months.

D Intine is made up of cellulose and pectin.

Correct Answer

Option A

Solution

(a) Pollen shed at 2-celled stage can still undergo double fertilization after the generative cell divides in the pollen tube.

Q8

What is the function of germ pore?

A Emergence of radicle

B Absorption of water for seed germination

C Initiation of pollen tube

D Release of male gametes

Correct Answer

Option C

Solution

(c) Germ pores are apertures in the exine where the pollen tube emerges.

Q9

Even in absence of pollinating agents seed setting is assured in

A Commelina

B Zostera

C Salvia

D Fig

Correct Answer

Option A

Solution

(a) Commelina has cleistogamous flowers ensuring seed set without pollinators.

Q10

What type of pollination takes place in Vallisneria?

A Male flowers are carried by water currents to female flowers at surface of water.

B Pollination occurs in submerged condition by water.

C Flowers emerge above surface of water and pollination occurs by insects.

D Flowers emerge above water surface and pollen is carried by wind.

Correct Answer

Option A

Solution

(a) Vallisneria shows epihydrophily — male flowers float to female flowers on water surface.