Sexual Reproduction in Flowering Plants · Question 48

Which one of the following statements is not true?

1. Pollen grains of many species cause severe allergies.
2. Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
3. Tapetum helps in the dehiscence of anther.
4. Exine of pollen grains is made up of sporopollenin.

Seed formation without fertilisation in flowering plants involves the process of

1. somatic hybridisation
2. apomixis
3. sporulation
4. budding.

Proximal end of the filament of stamen is attached to the

1. placenta
2. thalamus or petal
3. anther
4. connective.

Which of the following statements is not correct?

1. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
2. Some reptiles have also been reported as pollinators in some plant species.
3. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
4. Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.

In majority of angiosperms

1. egg has a filiform apparatus
2. there are numerous antipodal cells
3. reduction division occurs in the megaspore mother cells
4. a small central cell is present in that embryo sac.

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

1. water
2. insects or wind
3. birds
4. bats.

The ovule of an angiosperm is technically equivalent to

1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore.

Match Column-I with Column-II and select the correct option using the codes given below –

1. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
2. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
3. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
4. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

The wheat grain has an embryo with one large, shield shaped cotyledon known as

1. scutellum
2. coleoptile
3. epiblast
4. coleorhiza.

Filiform apparatus is characteristic feature of

1. aleurone cell
2. synergids
3. generative cell
4. nucellar embryo.