Chapter 2 Sexual Reproduction in Flowering 

The NCERT Class 12 Biology Chapter 2 is Sexual Reproduction in Flowering Plants. Students must understand all the concepts properly to score maximum marks in the board exams. Being thorough with topics and solving the in-text questions are the basics for efficient exam preparation. Hence, Vidyakul has provided NCERT Biology Class 12 Chapter 2 notes for free.

Practicing these questions develops problem-solving skills to ace the exams. Additionally, Vidyakul also explains concepts from the chapter in great detail. Scroll down to learn more.

CBSE CLASS 12th BIOLOGY CHAPTER -2

Points to Remember

Below are some of the important takeaways from NCERT notes for Class 12 Biology Chapter 2:

(i) Flowers have two essential whorls – androecium and gynoecium.

(ii) Androecium has stamens representing the male reproductive organ and the carpels represent female reproductive organs.

(iii) Each stamen has two parts – a filament and an anther.

(iv) Microspore mother cells go through the meiosis phase to form microspores that mature into pollen grains.

(v) Pollen grain has two layered walls – an outer exine and an inner intine.

(vi) Megaspore mother cells (2n) divide through meiosis.

(vii) The development of the embryo sac (normal type) or female gametophyte is monosporic. It is derived from a functional megaspore.

(viii) A mature female gametophyte or embryo sac is 77-celled and 88-nucleate at the time of fertilization.

Topics and Sub-topics

The Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants is an important chapter. In this chapter, students will learn about flowers, which are the fascinating organ of angiosperms, structure, and events in pre-fertilization and post-fertilization, double fertilization, pollination, and pollination methods, etc.

To help students understand the concepts in-depth, Students can also solve practice questions on Vidyakul to boost their confidence.

The topics included in the Sexual Reproduction in Flowering Plants are as follows:

Frequently Asked Questions

• What is meant by’Pre-fertilization’?

Pre-fertilisation is the process that occurs before the actual fertilization, i.e. the process before the fusion of gametes.

• What is an ‘Embryo sac’?

The female gametophyte of a seed plant consists of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization.

• What is a ‘Zygote’?

The zygote is a fertilized egg cell that results from the union of a female gamete (egg) with a male gamete (sperm).

Practice Questions 

• What is pollination?

• What is the function of the ovaries in a flowering plant?

• What are the female and male reproductive parts of a flower called?