ICSE Class 9 Biology Chapter 6 Seeds: Structure and Germination Revision Notes

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ICSE Class 9 Biology Chapter 6 : Seeds Structure and Germination Revision Notes

 

ICSE Class 9 Biology Chapter 6 Revision Notes are one of the most important pieces of study material that students can receive as it will aid them to study better and reduce the level of stress that students face during the hectic year.

Swiflearn provides Revision Notes and keynotes chapter wise for the ICSE board exam in an easy-to-understand, free downloadable PDF format so students can use it for their studies and score better in their board exams. The ICSE Class 9 Revision Notes are made for the main subjects of Science and Maths. These core subjects are very critical as they are the stepping stones and plays a crucial role in student’s future. They might be tricky for students. The ICSE Class 9 Biology Revision Notes for each chapter will enable them to have an expert studying pattern with which they can enjoy learning the subject and perform better in the exams.

ICSE Class 9 Biology Chapter 6 Revision Notes are designed  keeping in my mind the exam pattern and syllabus of NCERT 2020-21. Students can download the PDF for free and practice the questions to score well in the coming exams.

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ICSE Class 9 Biology Chapter 6 : Seeds Structure and Germination Revision Notes

 

The structure of Dicot Seed:
A bean (dicot) seed is normally kidney shaped, flat and has a notch on one side. Dicots have two seed leaves inside the seed coat. They are usually rounded and fat because they contain the endosperm to feed the embryo plant. Dicot seed consists of the following parts:

Hilum:
The hilum is the point where the seed is attached to the inner margin of the fruit.

Micropyle:
This is the opening through which the pollen tube enters the ovule. In the seed, the Micropyle imbibes water and softens the seed coats and allows the embryo to emerge. It allows diffusion of gases for respiration of the embryo.

Seed coats:
In dicots, the seed coat is further divided into an outer coat, known as the testa, and inner coat, known as the tegmen. The inner coat is thin, membranous and generally united with the testa. The seed coat is tough and waterproof. It covers and protects the embryo and the food supply.

Embryo:
The embryo is the baby plant, which emerges from the seed and germinates into a mature plant. The embryo consists of Cotyledons or seed leaves or nurse leaves. They are fleshy, green, leaflike structures and provide nourishment to the growing embryo. It also consists of Radicle or future root of the plant. It is the first to emerge out of the Micropyle during germination and develops into a tap root in the bean plant. Plumule or the embryonic shoot system. It has a growing point covered by undeveloped, delicate tiny leaves. It is attached to the radicle by the hypocotyl.

 

Seeds Structure And Germination

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