Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Sexual Reproduction in Flowering Plants

Question:

What advantage do seeds offer to angiosperms?

Options:

Dependency on water for reproduction

Improved dispersal strategies

Lack of genetic variability

Inability to survive in new habitats

Correct Answer:

Improved dispersal strategies

Explanation:

Seeds offer several advantages to angiosperms. Firstly, their reproductive processes, such as pollination and fertilization, are not dependent on water, making seed formation more reliable. Additionally, seeds possess effective strategies for dispersal, enabling plants to colonize new habitats. Moreover, seeds contain ample food reserves that sustain young seedlings until they can carry out photosynthesis independently. The presence of a hard seed coat provides protection to the developing embryo. Furthermore, seeds, being the result of sexual reproduction, introduce new genetic combinations, leading to genetic variations within plant populations.

In the context of agriculture, seeds form the foundation of our food production. Dehydration and dormancy are critical aspects of seed maturity, as they enable the storage of seeds for extended periods. This storage is essential for ensuring a consistent food supply throughout the year and facilitating the cultivation of crops in subsequent seasons. Dehydration reduces the seed's moisture content, while dormancy maintains a state of suspended growth, ensuring that seeds do not germinate prematurely. By preserving seeds, we can utilize them as a reliable source of food and as the starting point for crop cultivation in the future.

Dehydration of seeds involves reducing their moisture content to a level that allows for long-term storage without the risk of decay or germination. By removing water from the seeds, the metabolic activity of the embryo slows down, preserving its viability over extended periods. Dehydration prevents the growth of microorganisms and enzymatic reactions that could otherwise lead to spoilage. It also helps maintain the integrity and longevity of the stored seeds.

Dormancy, on the other hand, refers to a period of inactivity or suspended growth in seeds. Dormant seeds do not germinate even under favorable conditions of moisture, temperature, and oxygen availability. This dormancy period allows seeds to withstand unfavorable environmental conditions such as drought, cold temperatures, or lack of sunlight. It ensures that the seeds do not germinate prematurely, preserving their potential for future crop production.