Page 19 - Active Science 5 Ebook and Activity

D. State whether the following statements are true or false.

1. New plants mostly grow from leaves. _____
2. There is a tiny opening in the seed coat called hilum. _____

3. Roots and shoots shrink and cotyledons grow in size. _____
4. Cocklebur is an example of dispersal of seed by wind. _____

5. Manure is a natural fertilizer. _____

E. Give one word for each.
1. A plant grown in a particular area for a particular period of time for
consumption by human beings _______________

2. The seed covering that protects the seed _______________
3. Protecting the land from weeds and pests is done by spraying
these chemicals _______________

4. A small opening on the seed coat of seeds _______________
5. Potatoes grow from these _______________

F. Short Answer Questions.

1. Name the parts of plants from which vegetative propagation takes place.
2. What makes a coconut float on water although the seed inside it is heavy?

3. Name two ploughing methods used by farmers.
4. Name one plant each that can be propagated by stem, root and leaf.

5. Define dispersal.
6. Define germination.

G. Long Answer Questions.

1. Explain the process of reproduction from seeds.
2. List five reasons why seeds need to be dispersed.

3. What is the role of fertilizers? Explain.

4. Name some pests which destroy crop.
5. Define agriculture.
6. Differentiate between dispersal by wind and dispersal by water.

7. Describe the structure of a gram seed. Explain with the help of diagram.

H. Draw the diagram of the structure of the following and label the parts.
1. Bean seed

2. A seed with one cotyledon
3. A seed with two cotyledon

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Active Science-5