NCERT Solution for Class 10 Science Chapter 8
How do Organisms Reproduce?
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-133
Questions No-2
How will an organism be benefited if it reproduces through spores?
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There are many advantages, if an organism reproduces through spores.
Advantages of spore formation:
• Large numbers of spores are produced in one sporangium.
• Spores are distributed easily by air to far-off places to avoid competition at one
place.
• Spores are covered by thick walls to prevent dehydration under unfavourable
conditions.
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Spores formed are covered by
thick walls that protect them from adverse conditions. During favourable condition thick resistant wall breaks down and new organism grows from it.
Spores are very light weight and they easily get dispersed through winds which give them more variations and thus better chances of survival.
Advantages of spore formation:
1. Large numbers of spores are produced in one sporangium.
2. Spores are distributed easily by air to far-off places to avoid competition at one place.
3. Spores are covered by thick walls to prevent dehydration under unfavourable conditions.
The spores are covered by thick wall that protects them from unfavorable conditions like lack of food, water or high temperature. But as the conditions become favorable these spores can grow to produce new plant.
So, an organism will be benefited if it reproduces through spores.
The spores are covered by thick walls that protect them until they come into contact with suitable moist surface and can begin to grow. Thus spores help in survival of an organism during unfavourable conditions, until the return of suitable conditions.
Reproduction through spores provides several benefits to organisms, and this reproductive strategy is observed in various groups of organisms, including fungi, plants, algae, and some bacteria.
1. Dispersal: Spores are often small, lightweight, and easily dispersed by wind, water, or other means. This allows organisms to colonize new environments and habitats. The ability to disperse over long distances increases the chances of finding favorable conditions for growth and survival.
2. Survival in Harsh Environments: Spores often have protective coats or coverings that enable them to withstand harsh environmental conditions, such as extreme temperatures, desiccation, and exposure to UV radiation. This resilience enhances the chances of survival during unfavorable periods.
3. Rapid Colonization: Spores can germinate and develop into new organisms relatively quickly. This rapid colonization is especially advantageous in environments with variable conditions, allowing the organism to take advantage of short-lived favorable conditions.
4. Genetic Variation: Spores can be produced through processes like meiosis, leading to genetic variation among the offspring. This genetic diversity is important for adaptation to changing environments. It provides a pool of different traits that may be advantageous in specific conditions, facilitating the evolution of the population.
5. Life Cycle Alternation: In some organisms, such as plants and certain algae, spore production is part of a life cycle that includes alternation of generations. This alternation between a haploid (gametophyte) and diploid (sporophyte) phase allows for a combination of sexual and asexual reproduction, providing flexibility in response to environmental challenges.
6. Economical Energy Use: Spore production can be an energy-efficient method of reproduction compared to other strategies like seed or fruit production. This is because spores are often simpler structures that require less energy to produce.
7. Colonization of New Substrates: Many spore-producing organisms can colonize a wide range of substrates, including decaying organic matter, soil, or even the bodies of other organisms. This adaptability allows for the exploitation of diverse ecological niches.
In summary, the benefits of spore reproduction include efficient dispersal, survival in harsh conditions, rapid colonization, genetic variation, and adaptability to different environments. These advantages contribute to the ecological success of spore-producing organisms in various ecosystems.