Class 5 Science Pollination Worksheet

Class 5 Science Worksheet

Pollination

CHAPTER-4

I. Fill in the blanks

1. The male reproductive part of a flower is called __________.
2. The female reproductive part of a flower is called __________.
3. The outermost green part of a flower is called __________.
4. The swollen base of the carpel is called __________.
5. The sticky top of the carpel which receives pollen grains is called __________.
6. __________ pollination occurs when pollen grains from a flower fall on the stigma of the same flower.
7. Insects, wind, and water are examples of __________ of pollination.
8. A flower having both androecium and gynoecium is called __________ flower.

 

II. Give Reasons

1. Flowers are called the reproductive part of a plant.
2. Stigma is sticky in nature.
3. Insect-pollinated flowers are usually brightly coloured.
4. Self-pollination does not lead to variation.
5. Unisexual flowers need agents of pollination.

 

III. Short Answer Questions

1. Define pollination.
2. Write two differences between unisexual and bisexual flowers.
3. What is the function of calyx?
4. What are agents of pollination? Give examples.
5. Write the function of stamen.

 

IV. Long Answer Questions

1. Explain the structure of a flower with a neat diagram.
2. Differentiate between self-pollination and cross-pollination with examples.
3. Describe the parts of a carpel (pistil) and their functions.
4. Write a note on the importance of pollination in plants.
5. Explain with examples how insects help in pollination.

 

V. Competency-Based Questions

1. Riya saw that in her garden, papaya plants had flowers which did not bear fruits. What type of flowers are these and why can’t they form fruits?
2. A farmer planted only maize in his field. Which type of pollination will mainly occur in maize and why?
3. Sneha observed that a hibiscus flower could pollinate by itself. Which type of pollination is this and why is it possible?

VI. Case Studies :

1. In a village, farmers grew sunflowers. They noticed that honeybees visited the sunflower fields regularly. The bees sat on the flowers, collected nectar, and flew away to other flowers. While doing so, pollen grains from one flower stuck to their bodies and got transferred to another flower. This process helped in fertilization and seed formation.

Questions:

1. Which agent of pollination is involved here?
   a) Wind
   b) Insects
   c) Water
   d) Animals
2. What type of pollination took place?
   a) Self-pollination
   b) Cross-pollination
   c) Both a & b
   d) None
3. Bright colour and nectar in sunflower help in:
   a) Attracting bees
   b) Seed dispersal
   c) Photosynthesis
   d) Absorption of water

 

1. A farmer noticed that his maize plants produced flowers that were small and not brightly coloured. They had no fragrance or nectar. Still, the plants gave a good yield of grains. When the wind blew, pollen grains from the tassels (male flowers) reached the silks (female flowers) of other plants and fertilization occurred.

Questions:

1. Which agent of pollination is seen in maize?
   a) Water
   b) Insects
   c) Wind
   d) Animals
2. Which type of flowers are usually pollinated by wind?
   a) Fragrant and colourful
   b) Small, dull, without nectar
   c) Bright and large
   d) None of these
3. What type of pollination took place here?
   a) Cross-pollination
   b) Self-pollination
   c) Both a & b
   d) Artificial pollination

 

VII. Analytical Type Questions

1. X is the male reproductive part of a flower, Y is the female reproductive part. Identify X & Y.

 

2. X pollination occurs within the same flower, Y pollination occurs between two different flowers. Identify X & Y.

 

3. X is the collective term for sepals, Y is the collective term for petals. Identify X & Y.