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All questions of Reproduction in Plants for Class 8 Exam
Which of the following is a characteristic of wind-pollinated flowers?- a)They have long anthers
- b)They are large and colorful
- c)They produce sticky pollen
- d)They attract insects
Correct answer is option 'A'. Can you explain this answer?
Which of the following is a characteristic of wind-pollinated flowers?
a)
They have long anthers
b)
They are large and colorful
c)
They produce sticky pollen
d)
They attract insects
 | Arizona Academy answered |
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.
Which method of artificial vegetative propagation involves planting a stem cut into pieces?- a)Cutting
- b)Grafting
- c)Micro-propagation
- d)Layering
Correct answer is option 'A'. Can you explain this answer?
Which method of artificial vegetative propagation involves planting a stem cut into pieces?
a)
Cutting
b)
Grafting
c)
Micro-propagation
d)
Layering
| | Arizona Academy answered |
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.
What is the function of the pollen tube during fertilization?- a)It carries nutrients to the ovule
- b)It transports the male gametes to the ovule
- c)It protects the ovule from the environment
- d)It helps in seed dispersal
Correct answer is option 'B'. Can you explain this answer?
What is the function of the pollen tube during fertilization?
a)
It carries nutrients to the ovule
b)
It transports the male gametes to the ovule
c)
It protects the ovule from the environment
d)
It helps in seed dispersal
| | Arizona Academy answered |
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.
Which of the following is NOT a method of asexual reproduction in plants?- a)Fragmentation
- b)Pollination
- c)Spore formation
- d)Budding
Correct answer is option 'B'. Can you explain this answer?
Which of the following is NOT a method of asexual reproduction in plants?
a)
Fragmentation
b)
Pollination
c)
Spore formation
d)
Budding
| | Arizona Academy answered |
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.
What part of the flower contains the ovules?- a)Ovary
- b)Petal
- c)Sepal
- d)Stamen
Correct answer is option 'A'. Can you explain this answer?
What part of the flower contains the ovules?
a)
Ovary
b)
Petal
c)
Sepal
d)
Stamen
| | Arizona Academy answered |
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.
What is the role of petals in a flower?- a)To hold the flower together
- b)To produce pollen
- c)To protect the ovary
- d)To attract pollinators
Correct answer is option 'D'. Can you explain this answer?
What is the role of petals in a flower?
a)
To hold the flower together
b)
To produce pollen
c)
To protect the ovary
d)
To attract pollinators
| | Arizona Academy answered |
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.
What is the primary purpose of reproduction in plants?- a)To produce new plants and sustain the species
- b)To enhance photosynthesis
- c)To absorb nutrients from the soil
- d)To attract pollinators
Correct answer is option 'A'. Can you explain this answer?
What is the primary purpose of reproduction in plants?
a)
To produce new plants and sustain the species
b)
To enhance photosynthesis
c)
To absorb nutrients from the soil
d)
To attract pollinators
| | Arizona Academy answered |
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.
What does vegetative propagation involve?- a)The fusion of male and female gametes
- b)The process of pollination
- c)The production of new plants from vegetative parts
- d)The use of seeds
Correct answer is option 'C'. Can you explain this answer?
What does vegetative propagation involve?
a)
The fusion of male and female gametes
b)
The process of pollination
c)
The production of new plants from vegetative parts
d)
The use of seeds
| | Arizona Academy answered |
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.
What is the function of the stigma in a flower?- a)To attract pollinators
- b)To produce pollen
- c)To receive pollen grains
- d)To nourish the ovule
Correct answer is option 'C'. Can you explain this answer?
What is the function of the stigma in a flower?
a)
To attract pollinators
b)
To produce pollen
c)
To receive pollen grains
d)
To nourish the ovule
| | Arizona Academy answered |
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.
What is the process of seed dispersal?- a)The spreading of seeds to new locations
- b)The growth of seeds into new plants
- c)The fusion of male and female gametes
- d)The attraction of pollinators to flowers
Correct answer is option 'A'. Can you explain this answer?
What is the process of seed dispersal?
a)
The spreading of seeds to new locations
b)
The growth of seeds into new plants
c)
The fusion of male and female gametes
d)
The attraction of pollinators to flowers
| | Arizona Academy answered |
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.
Which of the following is an advantage of artificial pollination?- a)It increases genetic variation
- b)It eliminates the need for natural pollinators
- c)It guarantees seed dispersal
- d)It helps create new plant varieties
Correct answer is option 'D'. Can you explain this answer?
Which of the following is an advantage of artificial pollination?
a)
It increases genetic variation
b)
It eliminates the need for natural pollinators
c)
It guarantees seed dispersal
d)
It helps create new plant varieties
| | Arizona Academy answered |
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.
What type of fruit is formed by the ovary after fertilization?- a)Tuber
- b)Fruit
- c)Seed
- d)Flower
Correct answer is option 'B'. Can you explain this answer?
What type of fruit is formed by the ovary after fertilization?
a)
Tuber
b)
Fruit
c)
Seed
d)
Flower
| | Arizona Academy answered |
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.
What is micro-propagation in plant reproduction?- a)A method involving seed germination
- b)A type of grafting method
- c)A technique using tissue culture for rapid propagation
- d)A form of natural pollination
Correct answer is option 'C'. Can you explain this answer?
What is micro-propagation in plant reproduction?
a)
A method involving seed germination
b)
A type of grafting method
c)
A technique using tissue culture for rapid propagation
d)
A form of natural pollination
| | Arizona Academy answered |
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.
What process occurs after fertilization in flowering plants?- a)Budding
- b)Fruit formation
- c)Seed dispersal
- d)Pollination
Correct answer is option 'B'. Can you explain this answer?
What process occurs after fertilization in flowering plants?
a)
Budding
b)
Fruit formation
c)
Seed dispersal
d)
Pollination
| | Arizona Academy answered |
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.
What is a key advantage of using vegetative propagation for crop production?- a)It allows for genetic variation
- b)It requires more time than seed propagation
- c)It retains all good characteristics of the parent plant
- d)It increases the distance between plants
Correct answer is option 'C'. Can you explain this answer?
What is a key advantage of using vegetative propagation for crop production?
a)
It allows for genetic variation
b)
It requires more time than seed propagation
c)
It retains all good characteristics of the parent plant
d)
It increases the distance between plants
| | Arizona Academy answered |
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.
What type of pollination is primarily facilitated by insects?- a)Wind pollination
- b)Self-pollination
- c)Water pollination
- d)Cross-pollination
Correct answer is option 'D'. Can you explain this answer?
What type of pollination is primarily facilitated by insects?
a)
Wind pollination
b)
Self-pollination
c)
Water pollination
d)
Cross-pollination
| | Arizona Academy answered |
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.
Which part of the flower is responsible for producing pollen?- a)Carpel
- b)Sepal
- c)Petal
- d)Stamen
Correct answer is option 'D'. Can you explain this answer?
Which part of the flower is responsible for producing pollen?
a)
Carpel
b)
Sepal
c)
Petal
d)
Stamen
| | Arizona Academy answered |
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.
Which type of pollination occurs when pollen from one flower fertilizes the stigma of another flower on a different plant?- a)Artificial pollination
- b)Cross-pollination
- c)Self-pollination
- d)Insect pollination
Correct answer is option 'B'. Can you explain this answer?
Which type of pollination occurs when pollen from one flower fertilizes the stigma of another flower on a different plant?
a)
Artificial pollination
b)
Cross-pollination
c)
Self-pollination
d)
Insect pollination
| | Arizona Academy answered |
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.
In which form of asexual reproduction do organisms like spirogyra reproduce?- a)Binary fission
- b)Spore formation
- c)Budding
- d)Fragmentation
Correct answer is option 'D'. Can you explain this answer?
In which form of asexual reproduction do organisms like spirogyra reproduce?
a)
Binary fission
b)
Spore formation
c)
Budding
d)
Fragmentation
| | Arizona Academy answered |
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.
Which of the following is a disadvantage of vegetative reproduction?- a)It promotes genetic diversity
- b)It allows for rapid growth
- c)It produces genetically identical plants
- d)It is a simpler process than sexual reproduction
Correct answer is option 'C'. Can you explain this answer?
Which of the following is a disadvantage of vegetative reproduction?
a)
It promotes genetic diversity
b)
It allows for rapid growth
c)
It produces genetically identical plants
d)
It is a simpler process than sexual reproduction
| | Arizona Academy answered |
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.
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