🌱 12th Botany Important 2-Marks Public Exam Questions 2025

📚 Score Full Marks in 2-Mark Questions!
Get the most important 2-mark questions for the 12th Botany Public Exam 2025, compiled from previous year board exam papers. These short-answer questions help you quickly revise key concepts and secure easy marks in the exam.

🔹 Chapter-wise 2-mark questions with answers
🔹 Based on Tamil Nadu & CBSE Board syllabus
🔹 High-weightage topics selected from past exams
🔹 Covers Plant Physiology, Genetics, Biotechnology, Ecology & more

Chapter 3 :

1. Defferentiate transition and transvertion type of mutation?Pg59 Pg61
2. Define syndesis?Pg54 Pg56
3. What is a gene mapping?Pg56 Pg58
4. What is Tata Box?Nill BB48
5. What is meant by capping?Nill Pg71
6. What is meant by Jumping Genes?Nill Pg75
7. Give the types of synapsis?Pg54 Pg57

Chapter 4 :

1. Name the chemicals used in gene transfer?Pg76 Q21
2. Define Zymology?Pg69 Pg 83
3. What are restriction enzyme?Pg72 Pg85
4. Name the chemicals used in gene transfer?BB21 BB21

Chapter 5 :

1. Define Totipotency?Pg97 Pg111
2. What is called somatic hybridization?Pg100 Pg114
3. Write note on agar?Pg98 Pg112
4. Define callus?Pg99 pg113

Chapter 6 :

1. Which method is involved in the removal of cadmium from the contaminated soil,?define with example?  or What is phytoremediation?Pg114 Pg128
2. Distinguish Habitat and niche?Pg110 Pg124
3. What is co-evolution?Pg121 Pg135
4. Write the types of soil?Pg116 Pg130
5. What is vivipary?Name a plant group which exhibits vivipary?BB41 BB41
6. What is seed ball?Pg129 Pg143
7. Define Myrmecophilly?Pg121 Pg135

Chapter 7 :

1. Productivity of profundal zone will be low.why?Ln7 Pg159 BB15
2. Pyramid of energy is always upright.Give reason?Pg140 pg155
3. ‘Pyramids of biomass is always inverted in shape’ – state your explanation?Pg140 Pg155
4. Construct the food chain with the following data : Hawk,plants,Frog,Snake,Grasshopper?BB19 BB20
5. What is biogeochemical cycle?Pg141 Pg156
6. Write some plants are found in sub-alpine forest?Nill Pg172
7. What is blue carbon ecosystem?Pg144 Pg159

Chapter 8 :

1. What is CCS?Pg164 pg190
2. What is ozone hole?Pg158 Pg181
3. Write the effects of pesticide in human?Nill Pg185
4. Write any two global warming effects on plants?Pg157 Pg180
5. Draw and label the parts of relative contribution of gree house gases?pg156 Pg179
6. What are Agrochemicals?Nill Pg184
7. What is green house effect?Pg156 Pg179

Chapter 9 :

1. Define Norin 10?Pg179 Pg207
2. Define – Heterosis?Pg177 Pg205
3. Mention the benefits of seed treatment? Nill Pg209

Chapter 10 :

1. Name the humors that are responsible for the health of human beings?Pg196 Pg234
2. Define – Bonsai?Nill Pg241
3. Which one of the chemical substance is responsible for the yellow colour in turmeric?Mention the uses of that chemical substance?Pg192 Pg227

🎯 Master 2-Marks Questions in 12th Botany Public Exam 2025!
Practicing 2-mark questions is essential to boost your score in the public exam. These short-answer questions cover definitions, key terms, and important diagrams, ensuring you gain full marks easily.

🔍 More 12th Public Exam Study Resources:
📘 12th Computer Science Important questions 2025
📗 12th Tamil Study Plan 2025
📚 12th Std English Public Exam study Plan

📚 12Th Std Physics Important questions public exam 2025

📢 External References for Zoology Exam Preparation:
🔗 12th English one marks and grammar video tutorial
🔗 12th Botany onemarks shortcuts

🔗 12th Zoology onemarks shortcuts

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