science - getting to know plants

Class 6 - Science

Getting to Know Plants

Q&A
Question:

Explain an activity to test the presence of starch in a leaf.

Answer:

Take a leaf in a test tube and pour spirit till it completely covers the leaf. Now put the test tube in a beaker having water. Heat the beaker till all the green colour from the leaf comes out into the spirit in the test tube. Take out the leaf and wash it with water. Put it on a plate and pour some iodine solution over it. The iodine solution is brown in colour but when it comes in contact with starch it turns blue-black. The iodine solution will turn blue-black when dropped on the leaf, this confirms the presence of starch in the leaf.
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Questions and Answers


Getting to Know Plants - Questions
1.

Give names of two plants which have tap root.


Answer
2.

Name the various parts of pistil.


Answer
3.

Where does the photosynthesis take place in plants?


Answer
4.

Name the prominent parts of a flower.


Answer
5.

What are petals? Why are they generally coloured?


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6.

Name a plant that eats insect.


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7.

Write the names of the parts of a flower in sequence, from outside to inside.


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8.

What are the major parts of plants?


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9.

Give two examples of trees.


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10.

Correct the following statements and rewrite them in your notebook.
(a) Stem absorbs water and minerals from the soil.
(b) Leaves hold the plant upright.
(c) Roots conduct water to the leaves.
(d) The number of sepals and petals in a flower is always equal.
(e) If the sepals of a flower are joined together, its petals are also joined together,
(f) If the petals of a flower are joined together, then the pistil is joined to the petal.


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11.

Name two plants that belong to herbs.


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12.

Give two examples of shrubs.


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13.

What is lamina?


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14.

Name the part of plant which helps in holding the plant in the soil.


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15.

What are tap roots?


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16.

Does the stem prepare food for any plant?


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17.

Does the stem prepare food for any plant?


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18.

Name various parts of stamen.


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19.

What are trees? Give two examples.


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20.

What are creepers? Write an example.


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21.

What do you mean by a complete and incomplete flower?


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22.

Leaves need oxygen and carbon-dioxide (for photosynthesis). How do they get these gases?


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23.

Is it possible for you to recognise the leaves without seeing them? How?


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24.

Name the part of the plant which produces its food. Name this process.


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25.

In which part of a flower you are likely to find the ovary?


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26.

Are all the plants same in size?


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27.

How many kinds of plants are there?


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28.

What are veins?


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29.

How many types of leaf venation are there?
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Answer
30.

What is transpiration?


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31.

What are the raw materials for photosynthesis?


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32.

Where does the photosynthesis take place in plants?


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33.

What are lateral roots?


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34.

What are fibrous roots?


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35.

What are sepals? What are their functions?


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36.

What is pistil?


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37.

What are ovules?


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38.

Classify plants and give an example of each.


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39.

What are herbs? Give two examples.


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40.

Explain the main functions of leaf.


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41.

What are unisexual and bisexual flowers?


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42.

What are unisexual and bisexual flowers?


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43.

Name a plant that has underground as well as aerial (above the ground) root system.


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44.

Why do we see dew drops on leaves in the early morning?


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45.

Why are petals colourful?


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46.

Why does white flowers bloom at night?


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47.

What is the relation between leaf venation and the type of roots?


Answer
48.

Explain an activity to test the presence of starch in a leaf.


Answer
49.

Explain that sunlight is essential for photosynthesis.


Answer
50.

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


Answer