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

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

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.

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.

What are the three main parts of a carpel in the gynoecium?

What type of flower has the gynoecium positioned at the highest level with other floral parts located below it?

What is the function of the aleurone layer in a monocotyledonous seed?

Which part of a flower is considered the reproductive organ?

What is the outermost covering of a seed called?

Which of the following is NOT a part of the typical flower arrangement?

What part of the flower is the receptive surface for pollen grains?

What is the basal part of a carpel that houses the ovules in the gynoecium?

In which type of flower is the ovary described as superior?

In which type of flower are the other floral parts situated below the gynoecium, making the ovary superior?

What type of aestivation is observed in the petals of the china rose?

In which type of flower does the gynoecium occupy the highest position, with all other floral parts situated below it?

What is the primary function of the aleurone layer in a monocotyledonous seed?

What function do root hairs primarily serve in plants?

What type of aestivation is observed in the flowers of pea and bean plants?

Which of the following statements regarding the gynoecium is correct?

Which of the following statements about flower structure is correct?

Which combination of flower types correctly describes the position of the ovary in relation to other floral parts?

Which of the following statements about flower structure and ovary position is correct?

Which of the following statements about types of aestivation in flowering plants is correct?

Which of the following statements about flower structure is correct?

Which of the following combinations correctly describes the structure and characteristics of a dicotyledonous seed?

Which of the following statements about floral diagrams and formulas is correct?

Which of the following statements about the gynoecium and its structure is correct?