Functional megaspore in an angiosperm develops into

  • ovule

  • endosperm

  • embryo sac

  • embryo

The morphological nature of the edible part of coconut is

  • perisperm

  • cotyledon

  • endosperm

  • pericarp

Attractants and rewards are required for

  • anemophily

  • entomophily

  • hydrophily

  • cleistogamy

In majority of angiosperms

  • egg has a filiform apparatus

  • there are numerous antipodal cells

  • reduction division occurs in the megaspore mother cells

  • a small central cell is present in the embryo sac

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

  • water

  • insects or wind

  • birds

  • bats

Which one of the following statements is not true?

  • Exine of pollen grains is made up of sporopollenin

  • Pollen grains of many species cause severe allergies

  • Stored pollen in liquid nitrogen can be used in the crop breeding programmes

  • Tapetum helps in the dehiscence of anther

The coconut water from tender coconut represents

  • fleshy mesocarp

  • free-nuclear proembryo

  • free-nuclear endosperm

  • endocarp

Seed formation without fertilisation in flowering plants involves the process of

  • budding

  • somatic hybridization

  • apomixis

  • sporulation

Filiform apparatus is characteristic feature of

  • generative cell

  • nucellar embryo

  • aleurone cell

  • synergids

Which of the following are the important floral rewards to the animal pollinators?

  • Colour and large size of flower

  • Nectar and pollen grains

  • Floral fragrance and calcium crystals

  • Protein pellicle and stigmatic exudates

Placenta and pericarp are both edible portions in

  • apple

  • banana

  • tomato

  • potato

Geitonogamy involves

  • Pollination of a flower by the pollen from another flower of the same plant

  • Pollination of a flower by the pollen from the same flower

  • Pollination of a flower by the pollen from a flower of another plant in the same population

  • Pollination of a flower by the pollen from a flower of another plant belonging to a distant population

Pollen tablets are available in the market for

  • In vitro fertilisation

  • breeding programmes

  • supplementing food

  • Ex situ conservation

Function of filiform apparatus is to 

  • recognise the suitable pollen at stigma

  • stimulate division of generative cell

  • produce nectar

  • guide the entry of pollen tube

Non-albuminous seed is produced in

  • maize

  • castor

  • wheat

  • pea

Which one of the following statement is correct?

  • Hard outer layer of pollen is called intine

  • Sporogenous tissue is haploid

  • Endothecium produces the microspores

  • Tapetum nourishes the developing pollen 

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

  • cuticle

  • sporopollenin

  • lignin

  • cellulose

Even in absence of pollinating agents seed-setting is assured in

  • Commellina

  • Zostera

  • Salvia

  • fig

The coconut water and the edible part of coconut are equivalent to

  • endosperm

  • endocarp

  • mesocarp

  • embryo

Wind pollination is common in

  • lilies

  • grasses

  • orchids

  • legumes

Nucellar polyembryony is reported in species of

  • Gossypium

  • Triticum

  • Brassica

  • Citrus

In which one of the following pollination is autogamous?

  • Xenogamy

  • Chasmogamy

  • Cleistogamy

  • Geitonogamy

Apomictic embryos in Citrus arise from

  • synergids

  • maternal sporophytic tissue in ovule

  • antipodal cells

  • diploid egg

Transfer of pollen grains from the anther to the stigmaof another flower of the same plant is called

  • xenogamy

  • geitonogamy

  • karyogamy

  • autogamy

Wind pollinated flowers are

  • small, brightly coloured, producing large number of pollen grains

  • small, producing large number of dry pollen grains

  • large, producing abundant nectar and pollen

  • small, producing nectar and dry pollen

Which one of the following pairs of plant strucutre has haploid number of chromosomes?

  • Megaspore mother cell and antipodal cells

  • Egg cell and antipodal cells

  • Nucellus and antipodal cells

  • Egg nucleus and secondary nucleus

Endosperm is consumed by developing embryo in the seed of

  • coconut

  • castor

  • pea

  • maize

What does the filiform apparatus do at the entrance into ovule?

  • It helps in the entry of pollen tube into a synergid

  • It prevents entry of more than one pollen tube into the embryo sac

  • It brings about opening of the pollen tube

  • It guides pollen tube from a synergid to egg

Which one of the following is resistant to enzyme action?

  • Cork

  • Wood fibre

  • Pollen exine

  • Leaf cuticle

Male gametes in angiosperms are formed by the division of:

  • microspore

  • generative cell

  • vegetative cell

  • microspore mother cell

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