In an embryo sac, the cells that degenerate after fertilization are :a)Synergids and primary endosperm cellb)Synergids and antipodalsc)Antipodals and primary endosperm celld)egg and antipodalsCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Synergids and antipodals are the cells that are present in the embryo sac at the time of fertilization. Once the fertilization of the male gamete and the egg occurs and the zygote is formed, the synergids and antipodal cells degenerate after that and the ovary converts into a fruit...

Answer

Synergids are associated with the egg cell in the embryo sac. During fertilization, a ‘pollen tube’ grows into the synergids and the synergids are thought to help transport the pollen nucleus to the egg cell for fertilization.  Once it is fertilized, the synergids function is over and it degrades. The antipodal cells are nutritive and they ‘nourish the embryo sac’ and help in the ‘growth and development’ of the endosperm. Once fertilization occurs, the antipodal cells degrade.so, the op has to be B.

Answer

Synergids are associated with the egg cell in the embryo sac. During fertilization, a ‘pollen tube’ grows into the synergids and the synergids are thought to help transport the pollen nucleus to the egg cell for fertilization.

Once it is fertilized, the synergids function is over and it degrades. The antipodal cells are nutritive and they ‘nourish the embryo sac’ and help in the ‘growth and development’ of the endosperm. Once fertilization occurs, the antipodal cells degrade.

Answer

Embryo Sac Degeneration after Fertilization
Embryo sac degeneration is a natural process that occurs after fertilization in plants. In the embryo sac, certain cells degenerate to make space for the developing embryo and endosperm. One of the common examples of degenerating cells in an embryo sac are synergids and antipodals.

Synergids and Antipodals
- In the female gametophyte, the synergids are cells located near the egg cell and help guide the pollen tube to the egg during fertilization.
- Antipodals are cells located at the opposite end of the embryo sac from the egg cell and are involved in the development of the endosperm after fertilization.
- After fertilization, the synergids and antipodals degenerate to provide space for the growing embryo and endosperm.
- This degeneration process is necessary for the successful development of the embryo and endosperm in the plant.

Significance of Degeneration
- Degeneration of certain cells in the embryo sac is essential for the proper development of the embryo and endosperm.
- By eliminating excess cells, the plant can allocate resources more efficiently to support the growth of the developing embryo and endosperm.
- This process ensures the successful reproduction and propagation of the plant species.
In conclusion, the cells that degenerate after fertilization in an embryo sac are synergids and antipodals. Their degeneration is a crucial step in the development of the embryo and endosperm in plants.

Answer

In an embryo sac, the cells that degenerate after fertilization are Synergids and antipodals.

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Suggested Free Tests

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company