Solved 2012 Question Paper ICSE Class 10 Biology — Question 12
Back to all questions(i) Draw a well labelled diagram to show the metaphase stage of Mitosis in an animal cell having four chromosomes.
(ii) Mention any two reasons for the population explosion in India.
(iii) Give biological reasons for the following:
- Pituitary gland is also known as the master gland.
- Gametes have a haploid number of chromosome. [5]
Answer
(i) Well labelled diagram showing the metaphase stage of Mitosis in an animal cell having four chromosomes is shown below:
(ii) Two reasons for the population explosion in India are:
- Desire for a male child.
- Lack of awareness about birth control measures.
(iii) Biological Reasons:
- Pituitary gland is popularly called as the master gland because it controls the functioning of all the other endocrine glands.
- Gametes are produced as a result of Meiosis during which the chromosome number is reduced to half and each daughter cell receives half the set of chromosomes.
These gametes (egg and sperm) unite to form a zygote. If both of them were diploid, the zygote would have twice the number of normal chromosomes and the organism produced would be abnormal.
Answer: [5]
Key Concepts Covered
This question tests your understanding of the following concepts from the chapter Solved 2012 Question Paper ICSE Class 10 Biology: Question, Metaphase, Stage, Mitosis, Animal, Cell. These are fundamental topics in Biology that students are expected to master as part of the ICSE Class 10 curriculum.
A thorough understanding of these concepts will help you answer similar questions confidently in your ICSE examinations. These topics are frequently tested in both objective and subjective sections of Biology papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This Question
Read the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to Remember
- Use precise scientific terminology as defined in the textbook.
- Draw and label diagrams neatly for full marks.
- Understand the difference between structure and function.
- Learn processes step-by-step in the correct sequence.
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