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

Diadelphous stamens are found in

A typical angiosperm embryo sac at maturity is

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

Which of the following is incorrect for wind pollinated plants?

In water hyacinth and water lily, pollination takes place by

The plant part which consists of two generations, one within the other
I. Pollen grains inside the anther.
II. Germinated pollen grain with two male gametes.
III. Seed inside the fruit.
IV. Embryo sac inside the ovule.

What type of pollination takes place in Vallisneria?

In which of the following, both autogamy and geitonogamy are prevented?

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

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

Winged pollen grains are present in

Attractants and rewards are required for

A dioecious flowering plant prevents both

Functional megaspore in an angiosperm develops into

Which one of the following statements is not true?

Proximal end of the filament of stamen is attached to the

Which of the following statements is not correct?

In majority of angiosperms

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

The ovule of an angiosperm is technically equivalent to

Male gametophyte in angiosperms produces

Filiform apparatus is characteristic feature of

In angiosperms, microsporogenesis and megasporogenesis

Geitonogamy involves

Pollen tablets are available in the market for

Function of filiform apparatus is to

Megasporangium is equivalent to

Which one of the following statement is correct?

Advantage of cleistogamy is

Both, autogamy and geitonogamy are prevented in

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

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

Filiform apparatus is a characteristic feature of

Wind pollination is common in

In which one of the following pollination is autogamous?

Wind pollinated flowers are

Which one of the following plants is monoecious?

Which one of the following is resistant to enzyme action?

Unisexuality of flowers prevents

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

Male gametes in angiosperms are formed by the division of

Which one of the following is surrounded by a callose wall?

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

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

Which one of the following represents an ovule, where the embryo sac becomes horse shoe-shaped and the funiculus and micropyle are close to each other?

Anthesis is a phenomenon which refers to

An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is

In a flowering plant, archesporium gives rise to

Which type of association is found in between entomophilous flower and pollinating agent?

In angiosperms all the four microspores of tetrad are covered by a layer which is formed by

What is the direction of micropyle in anatropous ovule?

Anemophily type of pollination is found in

Eight nucleate embryo sacs are

Flowers showing ornithophily show few characteristic like

How many pollen grains will be formed after meiotic division in 10 microspore mother cells?

In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?

Chief pollinators of agricultural crops are

Ovule is straight with funiculus, embryo sac, chalaza and micropyle lying on one straight line. It is

Number of meiotic divisions required to produce 200/400 seeds of pea would be

Meiosis is best observed in dividing

Point out the odd one

Pollination occurs in

Embryo sac occurs in

Female gametophyte of angiosperms is represented by

Male gametophyte of angiosperms/monocots is

Male gametophyte of angiosperms is shed as

Double fertilisation is

Double fertilisation is exhibited by

Through which cell of the embryo sac, does the pollen tube enter the embryo sac

In angiosperms pollen tubes liberate their male gametes into the

Double fertilisation leading to initiation of endosperm in angiosperms require

Fertilisation involving carrying of male gametes by pollen tube is

Double fertilisation and triple fusion were discovered by

Double fertilisation is fusion of

Entry of pollen tube through micropyle is

Generative cell was destroyed by laser but a normal pollen tube was still formed because

Total number of meiotic divisions required for forming 100 zygotes/100 grains of wheat are

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

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

Seed formation without fertilisation in flowering plants involves the process of

The coconut water from tender coconut represents

Cotyledon of maize grain is called

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

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

Coconut water from a tender coconut is

Non-albuminous seed is produced in

Nucellar polyembryony is reported in species of

Apomictic embryos in Citrus arise from

Endosperm is consumed by developing embryo in the seed of

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

In angiosperms, triple fusion is required for the formation of

Study of formation, growth and development of new individual from an egg is

Nucellus embryo is

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

Which one of the following fruits is parthenocarpic? [

In a type of apomixis known as adventive embryony, embryos develop directly from the

Adventive embryony in Citrus is due to

Formation of gametophyte directly from sporophyte without meiosis is

Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilisation. It is

Development of an organism from female gamete/egg without involving fertilisation is