Class 12 Biology Important Chapter 1 Reproduction in Organisms Solutions English Medium As Per The New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 12 Biology Important Solutions in English and select need one. AHSEC Class 12 Biology Additional Notes Download PDF. HS 2nd Year Biology Additional Solutions.
Class 12 Biology Important Chapter 1 Reproduction in Organisms
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 12 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 2nd Year Biology Important Solutions English Medium for All Chapters, You can practice these here.
Reproduction in Organisms
Chapter: 1
| IMPORTANT QUESTION AND ANSWER |
Answer the Following Question:
1. What is vegetative propagation?
Ans: Vegetative propagation is a form of asexual reproduction in plants where new individuals grow from vegetative parts like roots, stems, or leaves (e.g., potato, ginger).
2. What is parthenogenesis?
Ans: Parthenogenesis is a form of reproduction where an egg develops into a new organism without fertilization (e.g., in some lizards and honeybees).
3. What is embryogenesis?
Ans: Embryogenesis is the process by which the zygote develops into an embryo through cell division and differentiation.
4. What is the juvenile phase in organisms?
Ans: The juvenile phase is the growth period before an organism reaches reproductive maturity.
5. Why is reproduction essential for organisms?
Ans: Reproduction is essential for organisms as it ensures the continuity of species. Without reproduction, life would cease to exist, and the genetic material of organisms would not be passed on to the next generation.
6. How do single-celled organisms reproduce asexually?
Ans: Single-celled organisms, like Amoeba, reproduce asexually through binary fission, where the parent cell divides into two identical daughter cells, each becoming a new organism.
7. Explain the process of binary fission.
Ans: Binary fission is a type of asexual reproduction in which a single parent cell divides into two identical daughter cells. The genetic material in the parent cell duplicates and separates into two halves, followed by the division of the cytoplasm.
8. What is vegetative propagation in plants?
Ans: Vegetative propagation is a type of asexual reproduction in plants where new plants grow from vegetative parts like roots, stems, or leaves. Examples include the growth of new plants from potato tubers, ginger rhizomes, and Bryophyllum leaf buds.
9. How does sexual reproduction increase genetic variation?
Ans: Sexual reproduction involves the fusion of male and female gametes, each contributing half of the genetic material. This process produces offspring with unique combinations of genes, leading to genetic variation among them.
10. What is fertilization, and how does it occur in plants?
Ans: Fertilization is the fusion of male and female gametes to form a zygote. In plants, it occurs when pollen grains (containing male gametes) are transferred to the stigma of the female flower. The pollen germinates and forms a pollen tube that carries the male gametes to the ovule, leading to fertilization.
11. What is the importance of meiosis in sexual reproduction?
Ans: Meiosis is important in sexual reproduction as it reduces the chromosome number by half, ensuring that gametes (sperm and egg) have only one set of chromosomes. This maintains the stability of the species’ chromosome number across generations when fertilization occurs.
12. What is a clone, and how is it produced?
Ans: A clone is an organism that is genetically identical to its parent. It is produced through asexual reproduction, where the offspring inherits the same genetic material from a single parent without the involvement of gametes.
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