Class 12 Exam > Class 12 Videos > Seed: Uses, Apomixis, Polyembryony- Sexual Reproduction in Flowering Plants, Biology, Class 12
Seed: Uses, Apomixis, Polyembryony- Sexual Reproduction in Flowering Plants, Biology, Class 12 Video Lecture
FAQs on Seed: Uses, Apomixis, Polyembryony- Sexual Reproduction in Flowering Plants, Biology, Class 12 Video Lecture
| 1. What is a seed and what is its role in sexual reproduction of flowering plants? |  |
Ans. A seed is a mature ovule containing an embryo and stored food surrounded by a protective seed coat. In sexual reproduction of flowering plants, the seed is formed after fertilization of the ovule by the pollen. It acts as a unit of dispersal and protects the embryo during germination and early growth.
| 2. What is apomixis and how does it differ from sexual reproduction in flowering plants? | |
Ans. Apomixis is a type of asexual reproduction in flowering plants where the embryo develops from the unfertilized ovule. It differs from sexual reproduction as it does not involve the fusion of male and female gametes. In apomixis, the embryo is genetically identical to the mother plant, whereas in sexual reproduction, the offspring have a combination of genetic material from both parents.
| 3. What is polyembryony and how does it contribute to the reproductive success of flowering plants? | |
Ans. Polyembryony is a phenomenon in which multiple embryos develop from a single fertilized ovule or from multiple ovules within the same ovary. It contributes to the reproductive success of flowering plants by increasing the number of offspring produced. This increases the chances of survival and dispersal of the species, as well as genetic diversity within a population.
| 4. How is sexual reproduction advantageous over asexual reproduction in flowering plants? | |
Ans. Sexual reproduction in flowering plants has several advantages over asexual reproduction. It promotes genetic diversity, which allows for adaptation to changing environments and provides a better chance of survival in the long run. It also allows for the formation of offspring with unique combinations of traits, leading to increased variation within a population. Additionally, sexual reproduction allows for the exchange and recombination of genetic material between individuals, facilitating the removal of harmful mutations from a population.
| 5. What are the factors that influence the success of sexual reproduction in flowering plants? | |
Ans. The success of sexual reproduction in flowering plants depends on various factors. These include the availability of compatible pollinators for effective transfer of pollen, the synchronization of flowering time between male and female reproductive structures, the presence of suitable environmental conditions for pollination and fertilization, and the presence of mechanisms to prevent self-fertilization. These factors play a crucial role in ensuring successful pollination and subsequent seed formation in flowering plants.
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