Test: Reproduction in Plants - SSS 2 MCQ

Vegetative propagation involves producing new plants from vegetative parts such as stems, roots, or leaves. This method allows for quicker reproduction and the retention of desirable traits from the parent plant, making it a favored method for farmers.

The primary purpose of reproduction in plants is to produce new plants and sustain the species. This process ensures that the plant species can grow, spread, and continue to exist over time. Reproduction can occur either asexually or sexually, each having its own methods and advantages.

Cutting is a method where a stem is cut into small pieces, each bearing an axillary bud, and planted in moist soil. This encourages the development of new roots and shoots, resulting in new plant growth.

The stamen is the male reproductive part of the flower responsible for producing pollen. It consists of the filament and the anther, where pollen grains are formed and stored until pollination occurs.

Wind-pollinated flowers typically have long anthers that protrude from the flower, allowing pollen to be easily blown away by the wind. These flowers are usually small and lack the bright colors and sweet scents that attract insect pollinators.

Cross-pollination occurs when pollen from one flower is transferred to the stigma of another flower on a different plant. This method increases genetic diversity, which can enhance the resilience and adaptability of the plant species.

Seed dispersal is the process by which seeds are spread to new locations, allowing them to grow into new plants. This can occur through various means, including wind, water, and animals, and is essential for the survival and spread of plant species.

The pollen tube's function is to transport the male gametes from the pollen grain to the ovule within the ovary. This is a critical step in the fertilization process, leading to the formation of seeds.

Insects primarily facilitate cross-pollination by transferring pollen from one flower to the stigma of another flower. This type of pollination enhances genetic diversity, which is beneficial for the adaptability of plant species.

The stigma's primary function is to receive pollen grains during the process of pollination. Once pollen reaches the stigma, it germinates and forms a pollen tube that grows toward the ovule for fertilization.

An advantage of artificial pollination is that it helps create new plant varieties by allowing plant breeders to control which plants cross-pollinate. This method can lead to improved traits, such as disease resistance or better yield.

Pollination is not a method of asexual reproduction; rather, it is a part of sexual reproduction where pollen is transferred to the stigma for fertilization. Asexual reproduction includes methods like budding, fragmentation, and spore formation, allowing plants to reproduce without the fusion of gametes.

Micro-propagation is a technique that uses tissue culture to propagate plants rapidly. This method allows for the growth of new plants from small pieces of plant tissue, ensuring that disease-free and genetically identical plants are produced.

A key advantage of vegetative propagation is that it retains all the good characteristics of the parent plant, producing genetically identical offspring. This is particularly beneficial for farmers who want to ensure the quality and traits of their crops remain consistent.

The ovules are contained within the ovary of the flower. After fertilization, these ovules develop into seeds, while the ovary matures into the fruit, which protects the seeds and aids in their dispersal.

After fertilization, the ovary undergoes a transformation to become a fruit, which protects the developing seeds. The ovule develops into a seed, completing the reproductive cycle of the plant.

A disadvantage of vegetative reproduction is that it produces genetically identical plants. While this ensures consistency in desirable traits, it also means that all offspring are equally susceptible to diseases, which can spread rapidly through a population.

Organisms like spirogyra reproduce by fragmentation, where long filaments break into pieces, each capable of growing into a new individual organism. This method allows for rapid population growth under favorable conditions.

Petals play a crucial role in attracting pollinators due to their bright colors and sometimes sweet scents. This attraction is vital for the process of pollination, which is essential for sexual reproduction in flowering plants.

After fertilization, the ovary develops into a fruit. The fruit serves to protect the seeds and aid in their dispersal, which is crucial for the lifecycle of the plant.