Fertilisation in Plants_Unsolved PaperSECTION NAME
Chapter: How Do Organisms Reproduce | Topic: Fertilisation in Plants
FERTILISATION IN PLANTS_UNSOLVED PAPERSECTION NAME
Topic: Fertilisation in Plants
Q1. What is fertilisation in a flowering plant?
- Transfer of pollen grains to the stigma
- Fusion of male and female gametes
- Formation of pollen grains in the anther
- Release of seeds from a fruit
Q2. After reaching the stigma, a pollen grain may germinate and form a:
- Seed tube
- Pollen tube
- Root tube
- Ovule tube
Q3. The pollen tube generally grows through the:
- Style
- Anther
- Filament
- Petal
Q4. Where is the female gamete located in a flowering plant?
- Inside the ovule
- Inside the anther
- Inside the filament
- On the stigma
Q5. What is formed immediately after the fusion of male and female gametes?
- Pollen grain
- Zygote
- Pollen tube
- Fruit
Q6. Which event occurs immediately before the fusion of male and female gametes?
- Formation of the fruit
- Growth of the pollen tube and delivery of the male gamete
- Formation of the seed coat
- Germination of the seed
Short questions
Q1. Define fertilisation. Name the male and female gametes involved in fertilisation in flowering plants.
Q2. Why is the pollen tube important for fertilisation? Mention the path it follows inside the flower.
Q3. What is the relationship between the pollen grain and the pollen tube during fertilisation?
Q4. Where does fertilisation occur in a flowering plant? Identify the structure in which the female gamete is present.
Q5.
During a biology practical, a student places a pollen grain on the stigma of a flower and observes it carefully.
What change would need to occur in the pollen grain for it to participate in fertilisation?
Q6.
A flowering plant has many pollen grains on its stigma, but no seeds are formed.
Why might pollen deposition alone not be sufficient for successful fertilisation?
Q1. Describe the sequence of events involved in fertilisation in a flowering plant, starting from the arrival of pollen on the stigma and ending with the formation of the zygote.
Q2. Explain the roles of the stigma, style, pollen grain, pollen tube, ovule, male gamete, and female gamete during fertilisation. Arrange their roles in the correct sequence.
Q3. Explain the changes that occur in a flower after successful fertilisation. Include the formation of the zygote and the development of the ovule and ovary into structures associated with the next generation.
Q1.
A student observes the following events in a flowering plant:
A pollen grain reaches the stigma.
A pollen tube grows downward.
The male gamete reaches the female gamete.
The gametes fuse.
a) Arrange these events in the correct order.
b) What is the product of the final event?
Q2.
A farmer observes that some flowers in his crop receive pollen normally, but the pollen tubes fail to grow properly through the style.
a) Which reproductive event is likely to be affected?
b) Why is proper pollen-tube growth important for successful fertilisation?
Q3.