Sexual Reproduction in Flowering Plants · Biology · NEET

In which of the following sets of families, the pollen grains are viable for months?

Transfer of pollen grains from anther to stigma of another flower of same plant is known as :

In angiosperms the correct sequence of events in formation of female gametophyte in the ovule is : (A) 3 successive free nuclear divisions functional ...

What is the function of tassels in the corn cob?

Large, colourful, fragrant flowers with nectar are seen in

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are :

Given below are two statements : One labelled as Assertion A and the other labelled as Reason R : Assertion A : In gymnosperms the pollen grains are r...

The residual persistent part which forms the perisperm in the seeds of beet is

To ensure that only the desired pollens fall on the stigma in artificial hybridization process (a) the female flower buds of plant producing unisexual...

In general the egg apparatus of embryo sac in angiosperm consists of

Given below are two statements: Statement I : Cleistogamous flowers are invariably autogamous Statement II : Cleistogamy is disadvantageous as there i...

Identify the incorrect statement related to Pollination:

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

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?

The body of the ovule is fused within the funicle at

The plant parts which consist of two generations - one within the other(i) Pollen grains inside the anther (ii) Germinated pollen grain with two male ...

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

Pinus seed cannot germinate and establish without fungal association. This is because :

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

Placentation, in which ovules develop on the inner wall of the ovary or in peripheral part, is :

Persistent nucellus in the seed is known as

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

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

Winged pollen grains are present in

Double fertilization is

Attractants and rewards are required for

A dioecious flowering plant prevents both

Functional megaspore in an angiosperm develops into an

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

Double fertilisation is exhibited by

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

In majority of angiosperms

The ovule of an angiosperm is technically equivalent to

The coconut water from tender coconut represents

Which one of the following statements is not true?

Seed formation without fertilisation in flowering plants involves the process of

Proximal end of the filament of stamen is attached to the

Which of the following statements is not correct?

Filiform apparatus is characteristic feature of

In angiosperms, microsporogenesis and mega-sporogenesis

Flowers are unisexual in

Which one of the following fruits is parthenocarpic?

Coconut water from a tender coconut is

Male gametophyte in angiosperms produces

Which one of the following may require pollinators, but is genetically similar to autogamy?

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

Which one of the following statements is not true?

Transmission tissue is characteristic feature of

The hilum is a scar on the

Which one of the following shows isogamy with non-flagellated gametes?

An aggregate fruit is one which develops from

Geitonogamy involves

Function of filiform apparatus is to

Pollen tablets are available in the market for

Non-albuminous seed is produced in

Animal vectors are required for pollination in

Albuminous seeds store their reserve food mainly in

Which one of the following statements is correct?

Which of the following statements is correct?

Megaspores are produced from the megaspore mother cells after

Seed coat is not thin, membranous in

Meiosis takes place in

Perisperm differs from endosperm in

Advantage of cleistogamy is

Megasporangium is equivalent to

Which one of the following statements is correct?

Product of sexual reproduction generally generates

What is the function of germ pore?

Which one of the following statements is wrong?

Plants with ovaries having only one or a few ovules, are generally pollinated by

Both, autogamy and geitonogamy are prevented in

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

Which one of the following is correctly matched?

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

In angiosperms, functional megaspore develops into

What is common between vegetative reproduction and apomixts?

Filiform apparatus is a characteristic feature of

Nucellar polyembryony is reported in species of

Which one of the following pollinations is autogamous?

Wind pollination is common in

The ''eyes'' of the potato tuber are

Vegetative propagation in Pistia occurs by

Examine the figures (A-D) given below and select the right option out of (a – d), in which all the four structures A, B, C and D are identified correc...

Apomictic embryos in Citrus arise form

Wind pollinated flowers are

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

Vegetative propagation in mint occurs by

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

Unisexuality of flowers prevents

Which one of the following is resistant to enzyme action?

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

Two plants can be conclusively said to belong to the same species if they

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

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

Parthenocarpic tomato fruits can be produced by

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...

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

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

Anthesis is a phenomenon which refers to

When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is

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

In angiosperms pollen tube liberate their male gametes into the

In angiosperm 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

In grasses what happens in microspore mother cell for the formation of mature pollen grains?

Adventive embryony in Citrus is due to

Eight nucleated embryo sac is

Endosperm is formed during the double fertilization by