Male gametophyte with least number of cells is present in :

  • Pteris

  • Funaria

  • Lilium

  • Pinus

Perisperm differs from endosperm in;
 
 
 
 

 
  • having no reserve food
  • being a diploid tissue
  • its formation by fusion of secondary nucleus with several sperms
  • being a haploid tissue

Advantage of cleistogamy is :

  • More vigorous offspring

  • No dependence of pollinator

  • Vivipary

  • Higher genetic variability

The gynoecium consists of many free pistils in flowers of

  • Aloe

  • Tomato

  • Papaver

  • Michelia

Filiform apparatus is a characteristic feature of

  •   egg

  •   synergid

  •   zygote

  •   suspensor

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?

  •   63

  •   84

  •   21

  •   42’

Nucellar polyembryony is reported in species of

  •   Gossypium

  •   Triticum

  •   Brassia

  •   Citrus

An example of a seed with endosperm perisperm and caruncle is

  • cotton

  • coffee

  • lily

  • castor

Unisexuality of flowers prevents

  •   autogamy, but not geitonogamy

  •   Both geitonogamy and xenogamy

  •   geitonogamy, but not xenogamy

  •   autogamy and geitonogamy

What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids ?

  • 16

  • 24

  • 32

  • 8

The arrangement of the nuclei in a normal embryo sac in the dicot plants is:

  • 2+4+2

  • 3+2+3

  • 2+3+3

  • 3+3+2

In a cereal grain, the single cotyledon of embryo is represented by :

  • coleorhiza

  • scutellum

  • prophyll

  • coleoptiles

Persistent nucellus in the seed is known as :

  • Tegmen

  • Chalaza

  • Perisperm

  • Hilum

In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as:

  •   Parthenogenesis

  •   Autogamy

  •   Parthenocarpy

  •   Syngamy

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

  • One fuses with the egg and other fuses with central cell nuclei

  • One fuses with the egg other (s) degenerate (s) in the synergid

  • All fuse with the egg

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

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

  • Ovules develop into embryo sac

  • Ovary develops into fruit

  • Zygote develops into embryo

  • Central cell develops into endosperm

The embryo sac of an Angiosperm is made up of
  • 8 cells
  • 7 cells and 8 nuclei
  • 8 nuclei
  • 7 cells and 7 nuclei

Which is the most common type of embryo sac in angiosperms?

  •  Tetrasporic with one mitotic stage of division

  •  Monosporic with three sequential mitotic divisions

  •  Monosporic with two sequential mitotic divisions

  •  Bisporic with two sequential mitotic divisions

What type of pollination takes place in Vallisneria ?

  •  Pollination occurs in submerged condition by water.

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

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

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

Identify the mismatch statement regarding post fertilization events from the following statements.

  • Wall of ovary is converted in to pericarp
  • Outer integument is converted in inner integument
  • Triploid nucleus develops as endosperm
  • Ovary is developed as fruit.

Which layer of the anther wall helps in its dehiscence?

  • A

  • B

  • C

  • D

The plant parts which consists of two generations one within the other:

(a) Pollen grains inside the anther

(b) Germinated pollen grain with two male gametes

(c) Seed inside the fruit

(d) Embryo sac inside the ovule

  • (a), (b) and (c)

  • (c) and (d)

  • (a) and (d) 

  • (a) only 

The body of the ovule is fused within the funicle at :

  • Micropyle

  • Nucellus

  • Chalaza

  • Hilum

In some plants, the thalamus contributes to fruit formation. Such fruits are termed as

  • False fruits

  • Aggregate fruits

  • True fruits

  • Parthenocarpic fruits

Which of the following is incorrect for wind-pollinated plants?

  • Well exposed stamens and stigma

  • Many ovules in each ovary

  • Flowers are small and not brightly colored

  • Pollen grains are light and non-sticky

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma, is:

  • Chasmogamy

  • Cleistogamy

  • Xenogamy

  • Geitonogamy

A typical angiosperm embryo sac at maturity is:

  • 7-nucleate and 7-celled

  • 8-nucleate and 8-celled

  • 8-nucleate and 7-celled

  • 7-nucleate and 8-celled

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

  • Poaceae; Solanaceae

  • Rosaceae; Leguminosae

  • Poaceae; Rosaceae

  • Poaceae; Leguminosae

Which of the following is called as the "bee orchid" due to the flowers resembling the furry bodies of bees?
 
  • Epidendrum secundum
  • Vanilla planifolia
  • Ophrys apifera
  • Dactylorhiza sambucina
At the four nucleate stage, the number of cells present in a female gametophyte of a typical angiosperm is:
 
  • 1
  • 2
  • 4
  • 7
0:0:1


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