Question
Describe the structure of seed by a suitable diagram.
✓
Answer
A typical seed consists of the following parts:
(i) Seed coat - It is the outer covering of the seed and develops from the integument of the ovule. Its outer layer is called testa and the inner layer is called tegmen. A seed coat protects the inner parts of the seed.
(ii) Micropyle - It is a small pore present near the hilum which allows entry of water into the embryo.
(iii) Embryo - It is the miniature plant present inside the seed coat. It develops from the fertilized egg. The embryo of a mature seed consists of cotyledons (or seed leaves), plumule, Hypocotyl, and radicle. Dicots have two cotyledons joined by a stalk whereas monocots have one cotyledon joined to the embryo. Cotyledons store food material for the embryo.
(iv) Endosperm - It is a food reserve present in certain seeds. Such seeds are called endospermic seeds.
(i) Seed coat - It is the outer covering of the seed and develops from the integument of the ovule. Its outer layer is called testa and the inner layer is called tegmen. A seed coat protects the inner parts of the seed.
(ii) Micropyle - It is a small pore present near the hilum which allows entry of water into the embryo.
(iii) Embryo - It is the miniature plant present inside the seed coat. It develops from the fertilized egg. The embryo of a mature seed consists of cotyledons (or seed leaves), plumule, Hypocotyl, and radicle. Dicots have two cotyledons joined by a stalk whereas monocots have one cotyledon joined to the embryo. Cotyledons store food material for the embryo.
(iv) Endosperm - It is a food reserve present in certain seeds. Such seeds are called endospermic seeds.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Explain the features of a forest biome?
According to position, endoskeleton is divided into how many parts? Explain each part.
List the six main purposes for which food is required by the body.
Match items in column A with the appropriate items in Column B:
| Column A | Column B | ||
| 1 | HCl | a | Lactose |
| 2 | Rennin | b | Pellagra |
| 3 | Enteropeptidase | c | Rumen |
| 4 | Cellulose | d | Pepsin |
| 5 | Ptyalin | e | Starch |
| 6 | Vitamin | f | Pernicious anaemia |
| 7 | Intestinal juice | g | Trypsin |
| 8 | Bile salt | h | Casein |
| 9 | Vitamin A | i | Micelle |
| 10 | Goitre | j | Night-blindness |
| k | Iodine | ||
State four differences between insect and wind pollinated flowers.
Write short notes on: Structure of Rhizopus
List the various differences between the animals and the plants.
Describe the bones of vertebral column.
Cartilage
Given below is a diagrammatic sketch of the vertical section of the human skin.
State one main function of each of the following parts :
Part 2___________
Part 3___________
Part 4___________
Part 9___________
Name any one of the above parts which has at least three functions.
State one main function of each of the following parts :
Part 2___________
Part 3___________
Part 4___________
Part 9___________
Name any one of the above parts which has at least three functions.