Question 4 of 15intermediate💡 UnderstandShort Answer2 marks

What is meant by monosporic development of female gametophyte?

Correct Answer

Monosporic development refers to the method of embryo sac formation from a single megaspore.

In a majority of flowering plants, out of the four megaspores formed, only one megaspore remains functional while the other three degenerate. This single functional megaspore then develops into the female gametophyte (embryo sac). Since the entire female gametophyte arises from just one megaspore, this process is called monosporic development.

Exercise: EXERCISES | Q: 5 | (Page 29)
For More Understanding

Explanation

The textbook clearly defines monosporic development in the section on Female gametophyte. The key points are: (1) One megaspore is functional while three degenerate, (2) Only the functional megaspore develops into the female gametophyte, and (3) This method of embryo sac formation from a single megaspore is termed monosporic development. The term 'monosporic' itself indicates 'single spore' origin.

Solution Steps

  1. Step 1: Identify the definition from context - embryo sac formation from a single megaspore

  2. Step 2: Explain the process - out of four megaspores, one remains functional while three degenerate

  3. Step 3: Conclude that this single functional megaspore develops into the female gametophyte

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