Sexual Reproduction in Flowering Plants

The body of the ovule is fused with the funicle at

1. Chalaza
2. Hilum
3. Micropyle
4. Nucellus

The plant parts which consist of two generations - one within the other

1. (i) and (iv)
2. (i) only
3. (i), (ii) and (iii)
4. (iii) and (iv)

In water hyacinth and water lily, pollination takes place by :

1. Insects and water
2. Water currents only
3. Insects or wind
4. Wind and water

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

1. Central cell develops into endosperm
2. Ovules develop into embryo sac
3. Ovary develops into fruit
4. Zygote develops into embryo

Persistent nucellus in the seed is known as

1. Hilum
2. Tegmen
3. Chalaza
4. Perisperm

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

1. One fuses with the egg, other(s) fuse(s) with synergid nucleus.
2. One fuses with the egg and other fuses with central cell nuclei.
3. One fuses with the egg, other(s) degenerate(s) in the synergid.
4. All fuse with the egg.

Which of the following has proved helpful in preserving pollen as fossils?

1. Pollenkitt
2. Cellulosic intine
3. Oil content
4. Sporopollenin

Winged pollen grains are present in

1. Mustard
2. Cycas
3. Mango
4. Pinus

Double fertilization is

1. fusion of two male gametes of a pollen tube with two different eggs
2. fusion of one male gamete with two polar nuclei
3. fusion of two male gametes with one egg
4. syngamy and triple fusion

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?

1. Hydrilla
2. Yucca
3. Banana
4. Viola

Pollen grains can be stored for several years in liquid nitrogen having a temperature of

1. -120 C
2. -80 C
3. -196 C
4. -160 C

The morphological nature of the edible part of coconut is

1. cotyledon
2. endosperm
3. pericarp
4. perisperm

Functional megaspore in an angiosperm develops into an

1. endosperm
2. embryo sac
3. embryo
4. ovule.

Attractants and rewards are required for

1. entomophily
2. hydrophily
3. cleistogamy
4. anemophily.

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

1. bee
2. wind
3. bat
4. water

A dioecious flowering plant prevents both

1. autogamy and geitonogamy
2. geitonogamy and xenogamy
3. cleistogamy and xenogamy
4. autogamy and xenogamy.

Double fertilisation is exhibited by

1. algae
2. fungi
3. angiosperms
4. gymnosperms

The coconut water from tender coconut represents

1. free nuclear proembryo
2. free nuclear endosperm
3. endocarp
4. fleshy mesocarp.

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.

In angiosperms, microsporogenesis and mega-sporogenesis

1. involve meiosis
2. occur in ovule
3. occur in anther
4. form gametes without further divisions.

Flowers are unisexual in

1. China rose
2. onion
3. pea
4. cucumber.