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Modes of Reproduction used by Single Organism Video Lecture - Class 10

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1. What are the different modes of reproduction used by single organisms?

Ans. The different modes of reproduction used by single organisms include asexual reproduction and sexual reproduction. In asexual reproduction, a single organism produces offspring that are genetically identical to itself. This can occur through various methods such as binary fission, budding, fragmentation, and spore formation. On the other hand, sexual reproduction involves the fusion of male and female gametes to produce offspring that inherit traits from both parents.

2. What is binary fission?

Ans. Binary fission is a mode of asexual reproduction used by single-celled organisms, such as bacteria and protozoans. In this process, the parent organism divides into two equal and identical daughter cells. The genetic material is replicated, and then the cell divides into two, resulting in the formation of two genetically identical offspring. This method allows for rapid multiplication of organisms and is a common mode of reproduction in many unicellular organisms.

3. How does budding work as a mode of reproduction?

Ans. Budding is a form of asexual reproduction in which a small outgrowth called a bud develops on the parent organism. This bud grows and eventually detaches from the parent, becoming an independent organism. The bud is genetically identical to the parent organism. Budding is commonly observed in organisms such as yeast, hydra, and some plants. It allows for the production of new individuals without the need for specialized reproductive organs.

4. What is fragmentation and how does it contribute to reproduction in single organisms?

Ans. Fragmentation is a mode of asexual reproduction in which a parent organism breaks into several pieces, each of which can grow into a new individual. Each fragment has the potential to develop into a complete organism. This mode of reproduction is observed in organisms such as flatworms, sea stars, and some plants. Fragmentation allows for the regeneration of lost body parts and the multiplication of organisms in favorable conditions.

5. How do single organisms reproduce through spore formation?

Ans. Spore formation is a mode of asexual reproduction used by certain single organisms, such as fungi, algae, and some plants. Spores are specialized structures that are produced by the parent organism and can develop into new individuals under favorable conditions. These spores are released into the environment and can be dispersed by wind, water, or other means. When a spore finds a suitable environment, it germinates and develops into a new organism. Spore formation allows for the widespread dispersal of organisms and the colonization of new habitats.

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