Students can view the full Botany practical notebook in the preview above.
Introduction
Botany is the branch of biology that deals with the scientific study of plants, including their structure, physiology, growth, and interactions with the environment. In the Class 12 curriculum of the National Examination Board (NEB) of Nepal, practical work is an important part of the biology course because it helps students understand plant biology through direct observation and laboratory experiments.
The Class 12 Botany Practical File is an essential component of the course. Students are required to perform various experiments related to plant anatomy, plant physiology, and plant tissue studies. These experiments must be carefully recorded in a practical notebook.
Practical work allows students to understand theoretical concepts in a more practical and visual way. Through experiments such as observing plant tissues under a microscope, studying the anatomical structure of monocot and dicot plants, and performing physiological experiments like osmosis, transpiration, and photosynthesis, students gain deeper knowledge of plant life processes.
The Class 12 Botany practical syllabus includes important laboratory activities such as:
- Study of anatomical structures of monocot and dicot plants
- Demonstration of osmosis using potato osmoscope and egg membrane
- Experiments on plant growth responses like phototropism
- Demonstration of physiological processes such as transpiration and ascent of sap
- Study of plant tissues including simple and complex permanent tissues
- Experiments related to photosynthesis and respiration
These activities help students develop scientific skills such as observation, microscope handling, diagram drawing, data recording, and experimental analysis.
In this article, we provide a complete overview of the Class 12 Botany Practical File according to the NEB syllabus. Students can use this guide to understand the experiments and maintain their own practical notebooks properly.
Index of Class 12 Botany Practical Experiments
The Class 12 Botany practical file includes several experiments related to plant anatomy, physiology, and plant tissues.
- Study of anatomical structure of monocot root
- Study of anatomical structure of monocot stem
- Study of anatomical structure of dicot root
- Study of anatomical structure of dicot stem
- Demonstration of osmosis using potato osmoscope
- Demonstration of osmosis using egg membrane
- Experiment on phototropism
- Experiment on apical bud removal
- Demonstration of ascent of sap
- Demonstration of transpiration using bell jar
- Measurement of transpiration rate using Ganong’s potometer
- Demonstration that oxygen is evolved during photosynthesis
- Study of plant slides (permanent slides)
- Study of simple permanent tissues
- Study of complex permanent tissues (xylem and phloem)
- Study of types of vascular bundles
- Demonstration of carbon dioxide evolution during anaerobic respiration
- Demonstration of imbibition using gram seeds
- Demonstration of unequal transpiration from two surfaces of a dorsiventral leaf
1. Study of Anatomical Structure of Monocot Root
In this practical experiment, students observe the internal structure of a monocot root under a microscope.
Important Structures Observed
- Epidermis
- Cortex
- Endodermis
- Pericycle
- Xylem and Phloem arranged in a ring
- Large central pith
Result
The monocot root shows radial vascular bundles with many xylem groups.
2. Study of Anatomical Structure of Monocot Stem
Monocot stems such as maize have scattered vascular bundles.
Important Features
- Epidermis
- Ground tissue
- Vascular bundles scattered throughout stem
Result
Vascular bundles are not arranged in a ring.
3. Study of Anatomical Structure of Dicot Root
Students observe the internal structure of dicot root.
Important Structures
- Epidermis
- Cortex
- Endodermis
- Pericycle
- Xylem star shaped
Result
Dicot roots show central xylem with few vascular bundles.
4. Study of Anatomical Structure of Dicot Stem
Dicot stems contain vascular bundles arranged in a ring.
Important Features
- Epidermis
- Cortex
- Vascular bundles in ring
- Pith
5. Demonstration of Osmosis Using Potato Osmoscope
Osmosis is the movement of water through a semipermeable membrane from a region of low solute concentration to high solute concentration.
Observation
Liquid level rises in the potato cavity.
Result
Water enters the cavity due to osmosis.
6. Demonstration of Osmosis Using Egg Membrane
The egg membrane acts as a semipermeable membrane.
Result
Water moves through the membrane showing osmosis.
7. Experiment on Phototropism
Phototropism is the growth of plants toward light.
Observation
Plant bends toward the light source.
8. Experiment on Apical Bud Removal
Apical dominance is controlled by plant hormones called auxins.
Result
Removal of apical bud leads to lateral branch growth.
9. Demonstration of Ascent of Sap
Ascent of sap refers to the upward movement of water in plants through xylem vessels.
10. Demonstration of Transpiration Using Bell Jar
Transpiration is the loss of water vapor from plant leaves.
Observation
Water droplets appear on the bell jar.
11. Measurement of Transpiration Rate Using Ganong’s Potometer
A potometer measures the rate of water uptake, which indicates transpiration rate.
12. Demonstration that Oxygen is Released During Photosynthesis
Aquatic plants such as Hydrilla release oxygen bubbles during photosynthesis.
13. Study of Plant Slides
Students observe prepared slides under microscope to identify plant structures.
14. Study of Simple Permanent Tissues
Types of simple permanent tissues:
- Parenchyma
- Collenchyma
- Sclerenchyma
- Chlorenchyma
- Aerenchyma
- Mesophyll
15. Study of Complex Permanent Tissues
Complex tissues consist of xylem and phloem.
Functions:
- Xylem transports water
- Phloem transports food
16. Study of Types of Vascular Bundles
Types include:
- Radial
- Collateral
- Bicollateral
- Concentric
17. Demonstration of CO₂ Evolution During Anaerobic Respiration
Yeast produces carbon dioxide during anaerobic respiration.
18. Demonstration of Imbibition Using Gram Seeds
Imbibition is the absorption of water by hydrophilic substances.
19. Demonstration of Unequal Transpiration from Two Surfaces of a Dorsiventral Leaf
This experiment shows that transpiration is greater on the lower surface of the leaf because more stomata are present there.
Conclusion
Botany practical experiments help students understand plant structure and physiology through direct observation and experimentation. The Class 12 NEB Botany practical syllabus includes important activities related to plant anatomy, plant physiology, and plant tissues.
Maintaining a well-organized practical file allows students to record their observations, draw diagrams clearly, and prepare effectively for practical examinations.
Thank You
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We hope this practical guide helps you understand the experiments and the correct format for preparing your botany laboratory record according to the NEB syllabus.
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