Science STD 6 Chapter 4: Getting to Know Plants - Exercises

Science STD 6 Chapter 4: Getting to Know Plants - Exercises

1. Correct the following statements and rewrite them in your notebook.

  1. Stem absorbs water and minerals from the soil.

    Correction: Roots absorb water and minerals from the soil.

  2. Leaves hold the plant upright.

    Correction: The stem holds the plant upright.

  3. Roots conduct water to the leaves.

    Correction: Stem conducts water to the leaves.

  4. The number of petals and stamens in a flower is always equal.

    Correction: The number of petals and stamens in a flower is not always equal.

  5. If the sepals of a flower are joined together, its petals are also joined together.

    Correction: If the sepals of a flower are joined together, its petals are separate.

  6. If the petals of a flower are joined together, then the pistil is joined to the petal.

    Correction: If the petals of a flower are joined together, the pistil is not necessarily joined to the petals.

2. Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 4.3.

This is a drawing activity that requires visual representation based on the diagrams in the chapter.

a) Leaf: Draw a leaf showing the petiole, lamina, midrib, and veins with reticulate or parallel venation.

b) Taproot: Draw a main central root with smaller lateral roots growing from it.

c) Flower: Draw a flower showing the sepals, petals, stamens (anther and filament), and pistil (stigma, style, and ovary).

3. Can you find a plant in your house or in your neighborhood, which has a long but weak stem? Write its name. In which category will you place it?

Yes, plants like the money plant have a long but weak stem. It cannot stand upright on its own and needs support to climb. Therefore, it is placed in the category of climbers.

4. What is the function of a stem?

The main functions of a stem are to hold the plant upright, bear leaves, branches, buds, flowers, and fruits, and to transport water and minerals from the roots to the leaves and food from the leaves to the other parts of the plant.

5. Which of the following leaves have reticulate venation? Wheat, tulsi, maize, grass, coriander (dhania), China rose.

The leaves with reticulate venation are: tulsi, coriander (dhania), and China rose.

6. If a plant has fibrous root, what type of venation do its leaves have?

If a plant has a fibrous root system, its leaves will have parallel venation.

7. If a plant has leaves with reticulate venation, what kind of roots will it have?

If a plant has leaves with reticulate venation, it will have a taproot system.

8. Is it possible for you to find out whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper?

Yes, it is possible. The type of leaf venation is directly related to the type of root system. If the leaf has reticulate venation (net-like pattern), the plant will have a taproot. If the leaf has parallel venation (veins running parallel to each other), the plant will have fibrous roots.

9. What are the parts of a flower?

The main parts of a flower are the sepals, petals, stamens, and pistil.

10. From the following plants, which of them have flowers? Grass, maize, wheat, chilli, tomato, tulsi, peepal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut.

All the plants listed have flowers, although they may not be as prominent or colourful as a rose or hibiscus. The plants are: grass, maize, wheat, chilli, tomato, tulsi, peepal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, and groundnut.

11. Name the part of a plant which produces food. Name the process.

The part of the plant that produces food is the leaf. The process is called photosynthesis.

12. In which part of a flower, you will find the ovary?

The ovary is the lowermost and swollen part of the pistil.

13. Name two plants in which one has joined sepals and the other has separate sepals.

A plant with joined sepals is Datura. A plant with separate sepals is the rose.

Suggested Projects and Activities

1. BECOME A LEAF EXPERT: Do this activity with a number of leaves over a period of few weeks...

Outline: This activity promotes observation and creative expression. Students collect and preserve leaves, noting their shape, size, venation, and other characteristics. The outcome is a "leaf expert" book or album where the dried leaves are pasted and their properties are documented. This hands-on project reinforces lessons about leaf types and venation in a personal and memorable way.

2. Names of plant parts are hidden in this grid. Search them by going up, down, diagonally, forward or backward.

Outline: This is a word search puzzle. The purpose is to help students recall and recognize key vocabulary words related to plant parts and functions. The answer is the list of words found in the grid.

List of words: OVULE, STEM, VEIN, HERB, FILAMENT, FLOWER, ROOT, PETAL, SEPAL, PISTIL.