NEET Botany Sexual Reproduction In Flowering Plants Class 12 Questions

Egg apparatus of an embryo sac in angiosperms consists of

In angiosperm, the haploid, diploid and triploid structures of a fertilised embryo sac sequentially are;

Majority of insect pollinated flowers are ?

In the animal-pollinated flowers, _____ is/are the usual floral rewards.

The process of formation of microspores:

Consider the following statements. (A) Pollen grains are well-preserved as fossils because of the presence of sporopollenin. (B) Intine in pollen grain is a thin and continuous layer made up of cellulose and pectin. Choose the correct option.

Which one of the following is a haploid structure?

In grasses which type of pollination is quite common?

In angiosperms, microsporogenesis, and mega sporogenesis:

When pollen grains of flower are transferred to stigma of another flower on a different plant, the process is called

Plant embryo develops from

If both male and female flowers are present on the same plant such as castor and maize (monoecious), it prevents;

For conducting artificial hybridization, if the mother plant produces unisexual flowers

Assertion (A): Cleistogamous flowers are invariably autogamous. Reason (R): Cleistogamous flowers do not open at all and the anthers and the stigma lie close to each other.

In some cereals like rice and wheat, pollen grains remain viable for __ P __ but in some members of Rosaceae, Leguminosae and Solanaceae, pollen viability is maintained for several __ Q __. P and Q respectively are

Assertion: Exine of a pollen grain is made up of sporopollenin which is resistant to high temperatures, strong acids or alkali as well as enzymatic degradation. Reason: Sporopollenin is absent in the region of germ pores.

How many meiotic division would be required to produced 100 male gametophyte in angiosperms

Which of the following statement is incorrect?

Given below are two statements : Statement-I: The release of sperms into the seminiferous tubules is called spermiation. Statement-II: Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below:

In embryosac, three cells are grouped together at the micropylar end to constitute

The synergies have special cellular thickening at the micropylar tip, called

The given diagram shows microsporangium of a mature anther. Identify A, B and C.

Which of the following is not a monoecious plant

Endosperm development precedes embryo development, because

Apomixis takes place in which of the following plant

In the given diagram, label the parts A, B, C, D, E.

Arrange the following in the correct developmental sequence related to microsporogenesis:

Match List I with List II:

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R) : The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and⁷⁻celled. Reason (R): The egg apparatus has 2 polar nuclei. In the light of the above statements, choose the correct answer from the options given below:

Match List I with List II:

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. Reason (R): Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. In light of the above statements, choose the most appropriate answer from the options given below:

How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?

Identify the set of correct statements: A. The flowers of Vallisneria are colourful and produce nectar. B. The flowers of waterlily are not pollinated by water. C. In most of water-pollinated species, the pollen grains are protected from wetting. D. Pollen grains of some hydrophytes are long and ribbon like. E. In some hydrophytes, the pollen grains are carried passively inside water. Choose the correct answer from the options given below:

Identify the part of the seed from the given figure which is destined to form root when the seed germinates.

Identify the correct description about the given figure:

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:

Identify the incorrect statement related to Pollination:

Given below are two statements: Statement I: Cleistogamous flowers are invariably autogamous Statement II: Cleistogamy is disadvantageous as there is no chance for cross pollination In the light of the above statements, choose the correct answer from the options given below:

A typical angiosperm embryo sac at maturity is:

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:

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

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

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

Persistent nucellus in the seed is known as:

Offsets are produced by

Which of the following flowers only once in its life-time?

Winged pollen grains are present in