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CBSE Class 10 Science Chapter 7 How Do Organisms Reproduce Worksheet with Answers

Reproduction is fundamental to species continuity and is one of the defining characteristics of living organisms. This printable worksheet for CBSE Class 10 Science Chapter 7 provides rigorous practice across all formats tested in board exams. It systematically covers asexual and sexual reproduction modes, reproductive structures in plants and animals, the human reproductive system, and reproductive health measures. Students should attempt this worksheet after completing NCERT textbook reading and basic revision.

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Key takeaways

✓Structured worksheet covering asexual reproduction, sexual reproduction, and human reproductive health as per NCERT Class 10 Science syllabus
✓Contains 6 MCQs, 5 fill-in-the-blanks, 5 match-the-following, 5 short-answer questions, 3 long-answer questions, and 1 case-study question
✓Difficulty level: Medium-to-High; Suggested time: 90 minutes for complete worksheet under exam simulation
✓All questions aligned with 2025 CBSE board exam pattern and NCERT ground truth terminology
✓Complete answer key with brief explanations provided for every question to support self-study and revision
✓Covers critical concepts: budding, fragmentation, spore formation, binary fission, human reproductive organs, fertilization, and contraception
✓Ideal for final revision, periodic tests, and identifying weak areas before CBSE Class 10 board exams

Quick Chapter Recap: How Do Organisms Reproduce

Chapter 7 of NCERT Class 10 Science explores the biological imperative of reproduction, the process by which organisms produce offspring of their own kind. The chapter distinguishes between asexual reproduction—where a single parent produces genetically identical offspring without gamete fusion—and sexual reproduction, which involves two parents and the fusion of male and female gametes, leading to genetic variation. Key asexual methods include binary fission in Amoeba, budding in Hydra and yeast, fragmentation in Spirogyra, regeneration in Planaria, and spore formation in fungi like Rhizopus. In flowering plants, vegetative propagation through runners, tubers, rhizomes, and artificial methods like grafting and layering are covered. Sexual reproduction in plants involves pollination, fertilization, and seed formation. The human reproductive system is detailed with male organs (testes, vas deferens, seminal vesicles, prostate) and female organs (ovaries, fallopian tubes, uterus, vagina). The menstrual cycle, fertilization, embryo implantation, and foetal development are explained. Reproductive health topics include contraception methods, sexually transmitted infections (STIs), and the importance of safe sexual practices. This chapter typically carries 5–8 marks in the board exam across different question formats.

Asexual reproduction: binary fission, budding, fragmentation, regeneration, spore formation, vegetative propagation
Sexual reproduction: gamete formation, pollination, fertilization, embryo development
Human male reproductive system: testes produce sperms and testosterone; accessory glands support sperm transport
Human female reproductive system: ovaries produce ova and hormones; uterus supports embryo development
Menstrual cycle: approximately 28-day cycle; ovulation around day 14; menstruation if fertilization does not occur
Reproductive health: contraception (barrier, chemical, surgical), prevention of STIs, safe motherhood

Worksheet Instructions and Difficulty Level

This worksheet is designed for students who have completed reading NCERT Class 10 Science Chapter 7 and want structured practice before periodic tests or the board exam. Difficulty level is rated as medium-to-high because it includes a mix of recall-based questions, application problems, and higher-order thinking questions that require analysis and evaluation. The suggested time to complete this worksheet under exam conditions is 90 minutes. Students should attempt all sections in sequence without referring to notes initially, then use the answer key for self-assessment. Each section tests different skills: Section A (MCQs) checks conceptual clarity and common misconceptions; Section B (fill-in-the-blanks) reinforces terminology; Section C (match-the-following) tests associations between structures and functions; Section D (short answers) requires concise explanations with correct scientific vocabulary; Section E (long answers) demands structured responses with diagrams where needed; and the case-study question assesses real-world application and data interpretation. This format mirrors the 2025 CBSE board exam pattern. For students needing step-by-step doubt clearance, CBSETUTOR.ai offers 24×7 AI tutor support with photo-upload problem solving at just ₹999/month for all subjects across Classes 6–12, with a 3-day free trial to explore the platform.

Difficulty Level: Medium-to-High
Suggested Time: 90 minutes (exam simulation mode)
Marks Distribution: Section A (6 marks), Section B (5 marks), Section C (5 marks), Section D (10 marks), Section E (9 marks), Case Study (5 marks) — Total 40 marks
Attempt all questions in sequence before consulting the answer key
Use diagrams wherever asked; neatly label all parts
Review incorrect answers with NCERT textbook pages for concept reinforcement

Section A: Multiple Choice Questions (1 mark each)

Multiple-choice questions are a staple of the CBSE Class 10 Science board exam, testing both factual recall and conceptual understanding. In Chapter 7 How Do Organisms Reproduce, MCQs often focus on distinguishing between asexual and sexual reproduction modes, identifying reproductive structures, understanding the menstrual cycle timeline, and recognizing contraceptive methods. Each question has four options, with only one correct answer. Students should read each option carefully, eliminate obviously incorrect choices, and apply NCERT-based knowledge. Common traps include confusing similar terms like 'budding' and 'binary fission', or mixing up male and female reproductive organs. These six MCQs are curated to reflect the variety and difficulty seen in recent board papers. They cover fundamental definitions, process sequences, organ functions, and application of reproductive health concepts. Practising MCQs regularly improves speed and accuracy, essential skills for scoring well in Section A of the board exam. Each correct answer earns 1 mark, with no negative marking, so attempt all questions even if unsure. After finishing, compare your answers with the detailed answer key provided later in this worksheet.

Section B: Fill in the Blanks (1 mark each)

Fill-in-the-blank questions test precise recall of terminology, definitions, structures, and processes. They require students to remember exact scientific words used in NCERT Class 10 Science textbooks. In Chapter 7 How Do Organisms Reproduce, key terms include names of reproductive organs, types of reproduction, stages of development, and reproductive health measures. These questions eliminate the multiple-choice safety net and demand active memory retrieval. When attempting this section, read the sentence carefully to understand context, recall related NCERT passages, and write the most appropriate term. Spelling accuracy is important; misspelt scientific terms may lose marks even if the concept is understood. The five questions below are arranged in increasing difficulty, starting with basic definitions and moving toward process-specific terms. Use the blank spaces to write your answers neatly. Avoid vague or colloquial language; stick to NCERT terminology. After completion, cross-check with the answer key to identify any knowledge gaps. If you consistently struggle with terminology, consider making flashcards for quick daily revision. For deeper concept explanations and instant doubt resolution, students can explore CBSETUTOR.ai, which offers detailed topic breakdowns and practice questions across all CBSE Class 10 Science chapters at just ₹999/month with a 3-day free trial.

Section C: Match the Following (1 mark each, total 5 marks)

Match-the-following questions assess your ability to connect related concepts, structures, and functions. This format is common in CBSE Class 10 Science exams and requires a clear understanding of how different elements within Chapter 7 How Do Organisms Reproduce relate to one another. Students must carefully read both columns, identify logical pairs based on NCERT content, and write the correct matches. Avoid random guessing; instead, eliminate obvious mismatches first, then pair the remaining items. This section tests associative memory—for example, linking a reproductive structure with its function, an organism with its mode of reproduction, or a term with its definition. The five pairs below cover a range of topics: asexual reproduction methods, human reproductive anatomy, plant reproduction, and reproductive health. Each correct match earns 1 mark. Write your answers as 'A-ii', 'B-iv', etc., clearly and neatly. If you find this section challenging, it indicates a need to revise the chapter with focus on functional relationships rather than isolated facts. Diagrammatic revision—labelling parts and writing their functions—can significantly improve performance in match-the-following questions. After completing, verify your matches against the answer key provided at the end of this worksheet.

Section D: Short Answer Questions (2 marks each)

Short-answer questions in CBSE Class 10 Science typically carry 2 or 3 marks and require concise yet complete explanations. For Chapter 7 How Do Organisms Reproduce, these questions often ask students to define terms, differentiate between concepts, explain processes briefly, or list functions of organs. The ideal answer length is 30–50 words, written in clear, grammatically correct sentences. Use scientific terminology from NCERT; avoid colloquial language. Start with a direct statement addressing the question, then provide supporting details or examples if space permits. Diagrams are not usually required for 2-mark questions but can be included if they add clarity and the question permits. The five questions below span the chapter's key topics: asexual reproduction, sexual reproduction in plants, human reproductive anatomy, fertilization, and reproductive health. Each question is designed to test both recall and basic understanding. Answer in point form or short paragraphs as appropriate. After attempting, compare your answers with the answer key, noting any missed points or incorrect explanations. If you find it difficult to frame concise yet complete answers, practice summarizing NCERT paragraphs into two or three sentences. This skill is critical not just for Science but for all subjects in board exams.

Section E: Long Answer and HOTS Questions (3 marks each)

Long-answer questions in CBSE Class 10 Science Chapter 7 carry 3 or 5 marks and demand detailed, structured responses. They test your ability to explain processes step-by-step, compare and contrast concepts, draw and label diagrams, or apply knowledge to new situations. Higher-Order Thinking Skills (HOTS) questions require analysis, evaluation, or synthesis rather than mere recall. For a 3-mark question, aim for 60–80 words organized into clear points or a short paragraph with a diagram if asked. Use subheadings or bullet points to improve readability. Always start by directly addressing the question, then elaborate with examples, reasons, or mechanisms. The three questions below focus on critical areas: asexual versus sexual reproduction, the human female reproductive system with a diagram, and a HOTS question on reproductive health and population control. Each question is worth 3 marks. Marks are awarded for content accuracy, clarity of explanation, and diagram quality where applicable. Label diagrams neatly with a sharp pencil and use arrows to indicate parts. Avoid vague statements like 'it helps in reproduction'; instead, specify how and why. Practising long-answer questions under timed conditions builds exam stamina and improves answer structuring. After completing, review the answer key carefully, noting how marks are distributed across different elements of the answer. For students who need help organizing long answers or understanding complex processes, CBSETUTOR.ai provides AI-powered step-by-step explanations and instant feedback on uploaded answers.

Section F: Case-Study Based Question (5 marks)

Case-study questions were introduced in recent CBSE board exams to assess application, analysis, and interpretation skills. A short passage or data set is provided, followed by 4–5 sub-questions worth 1 mark each. For Chapter 7 How Do Organisms Reproduce, case studies might describe a real-world scenario involving reproductive health, population data, plant propagation experiments, or animal breeding practices. Students must read the passage carefully, extract relevant information, and apply chapter concepts to answer the sub-questions. These questions often test your ability to infer, calculate, or suggest solutions rather than simply recall facts. The case study below presents a scenario about a school health awareness program on reproductive health. Read the passage thoroughly, underline key facts, and then attempt each sub-question. Write brief, direct answers; each sub-question typically needs only one or two sentences. Marks are awarded for correct interpretation and application of knowledge. Case studies integrate Science with real-life contexts, making learning more meaningful and preparing students for competitive exams beyond Class 10. After completing, check your answers against the detailed answer key. If you struggle with case-based questions, practice by reading science news articles and trying to frame your own questions and answers.

Complete Answer Key with Explanations

This section provides detailed answers with brief explanations for every question in the worksheet. Use this answer key for self-assessment after attempting all sections. Award yourself marks honestly, noting where you lost points due to incomplete answers, incorrect terms, or missed steps. Understanding why an answer is correct is more valuable than the mark itself. For MCQs, the correct option is given with a short reason. For fill-in-the-blanks and match-the-following, the correct terms and pairs are listed. Short-answer and long-answer keys provide model responses; your answer need not be identical but should cover the same key points. Marks are typically distributed as follows: definition or statement (1 mark), explanation or example (1 mark), diagram (1 mark if asked). If you scored below 70% on this worksheet, revise the chapter thoroughly, focusing on weak areas identified here. If you scored above 85%, you are well-prepared for this chapter, but continue practising other chapters and mixed-topic worksheets. For personalized feedback and doubt resolution, especially for diagram-based or application questions, students across India are turning to CBSETUOR.ai, which offers unlimited AI tutor access at a flat ₹999/month for Classes 6–12, with a 3-day free trial to experience the platform.

Section A answers with reasons for correct MCQ options
Section B correct terms with brief context
Section C correct matches with explanations
Section D model short answers with key points highlighted
Section E detailed long answers with diagram marking scheme
Section F case-study answers with reasoning

Frequently asked questions

What is the difference between asexual and sexual reproduction in CBSE Class 10 Science Chapter 7?+

Asexual reproduction involves a single parent and produces genetically identical offspring without gamete fusion, e.g. budding, binary fission. Sexual reproduction involves two parents, fusion of male and female gametes, and produces genetically varied offspring, ensuring diversity and adaptability in species.

How many marks does Chapter 7 How Do Organisms Reproduce carry in the CBSE Class 10 board exam?+

Chapter 7 typically carries 5–8 marks in the CBSE Class 10 Science board exam. Questions can appear as MCQs (1 mark), short answers (2–3 marks), or long answers with diagrams (5 marks). Case-study questions may also include 1-mark sub-questions from this chapter.

Which diagram is most important to practice for Chapter 7 in Class 10 Science?+

The most important diagrams are the male and female human reproductive systems. Label testes, vas deferens, seminal vesicles, prostate, urethra in males; and ovaries, fallopian tubes, uterus, cervix, vagina in females. Practise drawing these neatly with clear labels to score full marks in diagram-based questions.

What is vegetative propagation and why is it important for Class 10 Science students?+

Vegetative propagation is asexual reproduction in plants using vegetative parts like stems, roots, or leaves, e.g. potato tubers, Bryophyllum leaf buds. It is important because it produces genetically identical plants quickly, useful in agriculture and horticulture, and is a common 2-mark exam question.

How should I prepare short-answer questions for Chapter 7 How Do Organisms Reproduce?+

Focus on definitions, differences (asexual vs sexual, pollination vs fertilization), functions of organs (testes, ovary, placenta), and examples of reproduction methods. Write concise answers in 30–50 words, using NCERT terminology. Practice writing these answers under time limits to improve speed and clarity for board exams.

What are the key reproductive health topics covered in NCERT Class 10 Science Chapter 7?+

Key topics include contraceptive methods (barrier, chemical, surgical like condoms, pills, vasectomy, tubectomy), prevention of sexually transmitted infections (STIs), importance of spacing between pregnancies, and safe motherhood. These are often asked in 2- or 3-mark questions or in case-study format in board exams.

How is the menstrual cycle explained in Class 10 Science Chapter 7?+

The menstrual cycle is approximately 28 days. Ovulation occurs around day 14 when an ovum is released from the ovary. If fertilization does not occur, the uterine lining sheds, resulting in menstruation (bleeding) that lasts 3–5 days. Hormones like oestrogen and progesterone regulate this cycle.

What is the role of the placenta during pregnancy in Class 10 Science?+

The placenta is a disc-like structure in the uterus connecting the foetus to the mother. It allows oxygen and nutrients to pass from the mother's blood to the foetus and removes waste products from foetal blood. It also produces hormones to maintain pregnancy. This is a common 2-mark question.

Where can I get additional practice questions for CBSE Class 10 Science Chapter 7?+

You can find additional worksheets, MCQs, and previous-year questions in NCERT Exemplar, CBSE sample papers, and online platforms. CBSETUTOR.ai offers unlimited practice questions, instant doubt solving with photo upload, and AI-powered explanations for all chapters at ₹999/month for Classes 6–12, with a 3-day free trial.

How do I score full marks in diagram-based questions for Chapter 7?+

Draw diagrams neatly with a sharp pencil. Label all required parts clearly with straight label lines (not curved). Write the correct scientific names as given in NCERT. If the question asks for functions, write them briefly below the diagram. Practise diagrams multiple times to ensure accuracy and speed during the exam.

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