NCERT Exemplar Class 6 Science Chapter 7 Getting to Know Plants

In this chapter, we provide NCERT Exemplar Problems Solutions for Class 6 Science Chapter 7 Getting to Know Plants for English medium students, Which will very helpful for every student in their exams. Students can download the latest NCERT Exemplar Problems Solutions for Class 6 Science Chapter 7 Getting to Know Plants pdf, free NCERT Exemplar Problems Solutions for Class 6 Science Chapter 7 Getting to Know Plants book pdf download. Now you will get step by step solution to each question.

NCERT Exemplar Class 6 Science Solutions Chapter 7 Getting to Know Plants

Multiple Choice Questions

Question 1.
Which of the following combination of features would you observe in grass?
(a) Parallel venation and fibrous root
(b) Parallel venation and tap root
(c) Reticulate venation and fibrous root
(d) Reticulate venation and tap root
Solution:
(a): In parallel venation, veins run parallel to one another in the leaf. Fibrous roots are underground thin fibre like roots which arise in groups from the base of the stem. Parallel venation and fibrous roots are usually found in grass, maize, wheat etc.

Question 2.
Which of the following is the correct match between the characteristics of stem and the category of plant?
(a) Weak stem which cannot stand upright: Creeper
(b) Green tender stem: Shrub
(c) Thick, hard stem with branching near the base: Tree
(d) Thick, hard stem with branches high on the plant: Herb
Solution:
(a) : Herbs are the small sized plants with green, tender stem. Shrubs are the medium sized plants having thick, hard stem with branching near the base. Trees are the tall plants having thick, hard stem with branches high on the plant.

Question 3.
Which of the following is not the primary function of stem?
(a) Conduction of water
(b) Photosynthesis
(c) Formation of branches
(d) Bears flowers and fruits
Solution:
(b): Photosynthesis is the primary function of leaf.

Question 4.
Which of the following is not a correct match?
(a) Petiole: attaches leaf to stem
(b) Lamina: green flat part of leaf
(c) Margin: gives shape to the leaf
(d) Veins: transpiration
Solution:
(d) : Veins: Transpiration Veins transport water, minerals and food in the leaf, and provide support to the leaf.

Question 5.
Read the following sentences about photosynthesis.
(i) Sunlight, carbon dioxide, chlorophyll and water are necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis. Choose the correct pair of sentences that are true to photosynthesis.
(a) (iii) and (iv)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
Solution:
(b) : Oxygen is released during photosynthesis. Carbohydrates (glucose) are made during photosynthesis not proteins.

Question 6.
Which of the following terms constitute the female part of the flower?
(a) Sepals, petal and stamen
(b) Stigma, style and ovary
(c) Ovary, stamen and stigma
(d) Ovary, style and stamen
Solution:
(b): Carpel (pistil) is the female reproductive f part of a flower. It consists of stigma, style and ovary. Sepals and petals are accessory parts
and stamens are male reproductive parts of a flower.

Very Short Answer Type Questions

Question 7.
Fill in the blanks.
(a) The small green leaves at the base of flowers are known as _____.
(b) The swollen basal part of the____ pistil is the
which bears the ____.
(c) Stamen has two parts called_____ and ____.
(d) The young unopened flower is termed as______.
Solution:
(a) sepals
(b) ovary, ovules
(c) filament, anther
(d) bud.

Question 8.
Solve the riddles given below.
(a) “I have a green tender stem and I am much shorter than you. Who am I?”
(b) I come out first from the seed when it is soaked in water. I provide anchorage to plants. Who am I? Write another function that I perform.
Solution:
(a) : Herb – Herbs are the small plants with green and tender stem.
(b) Root comes out first from the seed when it is soaked in water. Another function of root is to absorb water and mineral from the soil.

Short Answer Type Questions

Question 9.
Match the parts of plant given in column I with their function in column II.

Solution:
(a)-(iii)
(b)-(ii)
(c)-(iv)
(d)(v)

Question 10.
Boojho wanted to test the presence of starch in leaves. He performed the following steps.
(1) He took a leaf and boiled it in water.
(2) He placed the leaf in a petri dish and poured some iodine over it.
He did not get the expected result. Which step did he miss? Explain.
Solution:
After boiling the leaf in water, it has to be boiled in alcohol so that chlorophyll is removed and the green colour of the leaf comes out. Boojho did not boil the leaf in spirit (alcohol) to remove the chlorophyll and therefore, he did not get the expected result (i.e. change in colour of the leaf).

Question 11.
Will a leaf taken from a potted plant kept in a dark room for a few days turn blue black when tested for starch? Give reasons for your answer.
Solution:
No, it will not turn blue black because all the starch stored in the leaf would have been used up by the plant and no starch would be synthesised in the leaves due to the non-availability of sunlight.

Question 12.
Can the stem of a plant be compared with a street with two-way traffic? Give reason.
Solution:
Yes. It is because in stem, water and mineral move in upward direction and food moves in downward direction. The stem conducts water and minerals from the root to leaves and other parts of the plant (upward). The food prepared by the leaves travels through the stem and is stored in different parts (downward).

Long Answer Type Questions

Question 13:
Read the function of parts of a plant given below:
(a) fixes plant to the soil
(b) prepares starch
(c) takes part in reproduction
(d) supports branches and bears flowers
In the diagram, write the names of the parts whose function you have just read at the appropriate space.

Solution:
Functions of parts of a plant labelled are :
(c) Flower (takes part in reproduction)
(d) Stem (supports branches and bears flowers)
(b) Leaf (prepares starch)
(a) Root (fixes plant to the soil)

Question 14:
Draw the veins of leaves given in the figure below and write the type of venation.

Solution:
The veins of leaves and their type of venation are:

Question 15:
Observe the figure and attempt the questions that follow it.

(a) Label the parts (i), (ii), (iii) and (iv) in the figure.
(b) What type of venation does the leaf has?
(c) What type of venation is seen in grass leaves?
Solution:
(a) In the given figure:
(i) Petiole
(ii) Mid rib
(iii) Lamina
(iv) Vein
(b) The leaf has reticulate venation, the veins in leaf occur in an irregular way forming a net-like structure.
(c) Grass leaves have parallel venation. The vein run parallel to each other on both sides of mid rib.

Question 16:
Observe the figure of an activity given as figure, carried out with leaves of plants and polythene bag. Now answer the following.

1. Which process is demonstrated in the activity?
2. When will this activity show better results on a bright sunny day or a cloudy day?
3.  What will you observe in the polythene bag after a few hours of setting up the activity?
4.  Mention any one precaution you must take, while performing this activity.
   

Solution:

1. The process demonstrated in the activity is transpiration. It is loss of water in the form of vapour from plant.
2. The activity will show better results on a bright sunny day because transpiration ,s maximum in sunlight.
3. After a few hours of setting up the activity, one can observe small droplets of water inside the polythene bag. Since, the leaves are enclosed in polythene bag. the water vapour cannot escape into air and keeps on collecting inside the polythene bag.
4. A major precaution one must take, while performing this activity is that the polythene bag should be clean and dry and its mouth should be sealed properly to make the set-up air-tight. Also, the twig should be fresh with 10-12 leaves.

Question 17.
Identify the wrong statements and correct them.
(a) Anther is a part of the pistil.
(b) The visible parts of a bud are the petals.
(c) Lateral roots are present in a tap root.
(d) Leaves perform the function of transpira-tion only.
Solution:
(a) Wrong – Anther is a part of the stamen.
(b) Wrong – The visible parts of a bud are the sepals.
(c) Correct
(d) Wrong – Leaves perform the various functions other than transpiration, such as photosynthesis, gaseous exchange through stomata etc.

Question 18:
Solve the crossword given in figure as per the clues given below it.

Across
1. The term that describes upward movement of water in a stem.
3. The part of Leaf, which is attached to the stem.
5. This part is attached to the tip of filament.
Down
1. Plants that are weak and spread on the ground.
2. Ovules are present in this part of flower.
4. It is the broad part of leaf.
Solution:
Across
1. CONDUCTION
3. PETIOLE
5. ANTHER
Down
1. CREEPERS
2. OVARY
4. LAMINA

Question 19.
Fill in the blanks with the terms that are listed below.
anther, male, ovary, ovule, petals, pistil, stamen, filament.
Sepals, (a)____ . stamens and (b)____ are the parts of a flower. Stamen is made up of (c)____ and (d)____ and it represents the (e)____part of the flower. The female part of the flower is called the (f)_____. The basal, swollen part of the pistil is called the (g)____ which contains the (h)_____.
(a) petals
(b) pistil,
(c) anther,
(d) filament,
(e) male,
(f) pistil,
(g) ovary,
(h) ovules.

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