WRITE AN EXPERIMENT TO PROVE WHICH OF GIVEN SEED IS DICOT AND MONOCOT
what are the materials required and the procedure
Answers
Answer:
Experiment:
Objective:
To study the external features of root, stem, leaf and flower of monocot and dicot plants.
Apparatus and materials required:
Glass slides, forceps, hand lens, scissors, dissecting microscope, a complete monocot plant such as onion or paddy or wheat or maize, and a complete dicot plant such as mustard or sunflower or pea.
Theory:
Experiment:
Objective:
To study the external features of root, stem, leaf and flower of monocot and dicot plants.
Apparatus and materials required:
Glass slides, forceps, hand lens, scissors, dissecting microscope, a complete monocot plant such as onion or paddy or wheat or maize, and a complete dicot plant such as mustard or sunflower or pea.
Theory:1. The part of a plant that generally develops from the radicle of embryo is called root.
2. It fixes the plant firmly into the ground and provides rigidity against wind and water.
3. It absorbs water and minerals from soil.
4. It grows towards the centre of gravity, i.e., it is positively geotropic.
5. It possesses unicellular root hairs.
6. It normally grows away from light, i.e., it is negatively phototropic.
7. It does not bear buds, leaves and flowers, and lacks nodes and internodes.
8. The root has four regions from the apex to the base:
Monocot root:
1. In monocots, primary root does not persist for a longer period. It is soon replaced by a cluster of long, threadlike roots which originate from the base of the stem. These roots are called fibrous roots.
2. Roots developing from any other part of the plant than radicle are called adventitious roots.
Monocot stem:
1. It is aerial, erect, herbaceous or woody, usually unbranched.
2. It is usually differentiated into solid nodes and hollow internodes. In maize, internodes are also solid.
3. In some members stem is modified into underground organs like rhizome (e.g., ginger), corm (e.g., Colocasia) or bulb (e.g., onion).
1. It is normally long, erect, herbaceous or woody, cylindrical and branched.
2. It has distinct nodes and internodes. Both the nodes and internodes are solid.
3. Sometimes it is creeping and modified into tendril.
4. It is often four-angled (quadrangular) or five-angled (pentangular).
5. In potato, the underground stem is modified into tubers.
Leaf:
Identifying features of leaf:
1. It is the lateral appendage of the stem that arises at the node.
2. It bears a bud in its axil.
3. It is attached to the stem with the help of a structure called the leaf base.
4. A stalk called petiole develops from the leaf base which bears a green flattened structure called lamina.
5. Lamina, or leaf blade, has midrib, veins, and leaf apex and leaf margin.
6. The leaves are grouped into two categories—simple and compound—on the basis of incision. Simple leaves have a single lamina. When the incision of the lamina goes down to the midrib, the leaf becomes compound having a number of leaf segments called leaflets.
7. The main functions of leaves are synthesis of food (photosynthesis), transpiration, and exchange of gases through its pores called stomata.
8. Sometimes leaves get modified for storage, defense, support, reproduction and trapping insects.