🌱 12th Botany Important 5-Marks Public Exam Questions 2025

📚 Score Full Marks in 5-Mark Questions!
Get the most important five 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 five mark questions with answers
🔹 Based on Tamil Nadu syllabus
🔹 High-weightage topics selected from past exams
🔹 Covers Plant Physiology, Genetics, Biotechnology, Ecology & more

Chapter 1 :

  1. Give detailed account on parthenocarpy.Add a note on its significance?Ln1 Pg27
  2. Explain the types of ovule with diagram?Ln1 Pg11
  3. With suitable diagram,explain the structure of an ovule?Pg10 Pg10
  4. What is polyembryony.How it can commercially Exploited?Ln1 pg27
  5. Enumerate the characteristics features of Entomophilous flowers?Ln1 pg18
  6. Differentiate the structure of Dicot and Monocot seed?Ln1 Q63
  7. Discuss the steps involved in microsporogenesis?Ln1 Pg6
  8. Explain the pollination mechanism in salvia?Pg17 Pg18
  9. Advantages of conventional methods?Pg5 Pg5

Chapter 2 :

  1. Bring out the inheritance of chloroplast gene with an example.Ln2 Q37
  2. Explain polygenic inheritance with an example?Ln2 Pg45
  3. Describe dominant epistasis with example?Ln2 pg44
  4. What is Dihybrid cross?Explain it?Ln2 Pg40
  5. Explain incomplete dominance?Pg40 Pg43

Chapter 3 :

  1. Explain the mechanism of crossing over?Ln3 Pg56
  2. Explain the experiment of coupling?Ln3 55
  3. Explain DNA replication in Eukaryotes?Ln3 Pg68
  4. What is point mutation?Explain various types of point mutation?Ln3 Pg61
  5. Tabulate the types of ploidy?Pg61 Pg64
  6. Mention the name of man – made cereal how it is formed?Pg63 Pg65

Chapter 4 :

  1. Mention the application of Biotechnology?Ln4 Q23
  2. compare various types of blotting Techniques?Ln4 Pg93
  3. What is bioremediation?write any three types?Ln4 pg99&100
  4. What do you mean by biopiracy?Explain Biopiracy in Neem and Basmati Rice?Ln4 Pg101

Chapter 5 :

  1. Explain the basic concept involved in plant tissue culture?Ln5 Pg111
  2. Mention the applications of plant tissue culture?Ln5  Pg116
  3. Write the advantages of artificial seeds?Pg102 Pg117
  4. Write any three secondary metabolites and its plant resources with uses?Pg101 Pg115

Chapter 6 :

  1. What is soil profile?Explain the characters of different soil horizons?Ln6 Pg130
  2. Enumerate the anatomical adaptations of xerophytes?Ln6 Pg139
  3. Give an account of various types of parasitism with examples?Ln6 Pg134
  4. What is ‘Epiphytes’ Bring out the morphological adaptation present in it?Ln6 Pg140
  5. Explain different types of hydrophytes with examples?BB52 BB52
  6. What are the advantages of seed dispersal?Pg129 Pg143

Chapter 7 :

  1. Rearrange the various stages of succession.Find out the type of succession ?Explain in detail?Read-swamp stage.phytoplankton stage,shrub stage,submerged plant stage,forest stage,submerged free floating stage,marsh medow stage?Ln7 BB26
  2. List out the human activities disturb the ecosystem?Ln7 Pg161
  3. Write the significance of plant succession?Ln7 Pg168
  4. Bring out the different steps involved in mechanism of decomposition ?Ln7 156
  5. What is ten percent law?Explain it with diagram?Pg137 Pg152

Chapter 8 :

  1. Explain afforestation with case studies?Ln8 Pg184
  2. What is global warming?write the effects of global warming?Ln8 Pg179
  3. What are the effects of ozone depletion?Ln8 Pg181
  4. Write the importance of geographic information system?Pg167 Pg194

Chapter 9 :

  1. What is biofertilizers?and write their uses?Ln9 Pg200
  2. What are the different types of hybridization?Ln9 Pg205
  3. Mention the various modern methods of seed protection?Ln9 Pg209

Chapter 10 :

  1. How to prepare portable miniature indoor greenery?Explain it?Ln10 Pg240
  2. How will you prepare an organic pesticide for your home garden with the vegetables available from your kitchen?Ln10 BB51
  3. How will you prepare organic pesticide and how will you handle it?Ln10 Pg239

🎯 Master 5-Marks Questions in 12th Botany Public Exam 2025!
Practicing five 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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