Here in this post we provided NCERT Exemplar Problem Class 6 Science Getting to Know Plants Chapter 7 Full Explanation by group of Science Experts. We have provided here each questions answer with reason behind the answer.
Hope it help you!
Getting to Know Plants Class 6 Exemplar full Explanation:
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Multiple Choice Questions
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
Answer:- a) parallel venation and fibrous root.
Grass have the parallel Venation along with the fibrous roots.
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
Answer:- a) weak stem which cannot stand upright : creeper
The correct statement is creeper which have weak stem and that cannot stand upright without any support.
Other are false statements.
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
Answer:- b) photosynthesis
Photosynthesis is main function performed by the leaves. Stemperform the main function of support to the plant. But as secondary function it performs photosynthesis also.
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
Answer:- d) veins: transpiration
Veins : Transpiration is false statement. Transpiration is performed by the stomata present on the lower side of leaf.
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)
Answer:- b) i) and iii)
Photosynthesis is the main the function of leaves. Which is performed with the presence of sunlight, carbon dioxide , chlorophyll, and water.
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
Answer:- b) stigma, style and ovary
The female part of the flower shows the parts of stigma, style and ovary. Other pairs contains wrong parts.
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Very Short Answer Questions
7) Fill in the blanks:
a) The small green leaves at the base of flowers are known as ___________ .
Answer:- The small green leaves at the base of flowers are known as sepals.
b) The swollen Basel part of the _____________ pistol is the which bears the _________.
Answer:- the swollen part of the ovary pistol is the which bears the ovules.
c) Stamen has two parts called ________ and _________.
Answer:- stamen has two parts called Filament and anther.
d) The young unopened flower is termed as __________.
Answer:- The young unopened flower is termed as bud.
8) Solve the riddles given below:
a) “ I have a green tender stem and I am much shorter than you. Who am I?”
Answer:- it is a herb. It have tender stem and shorter in height.
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 perform.
Answer:- Roots. Roots comes out first from seed. And it provides anchorage to plant. Another function performed by the roots are absorption of water and minerals from the soil.
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Short Answer Questions
9) Match the parts of plant given in column I with their function in function in column II .
Column I | Column II |
a) Flower | i) Excretion |
b) Leaf | ii) Photosynthesis |
c) Stem | iii) Reproduction |
d) Root | iv) Bears branches |
v) Anchorage |
Answer:-
a) Flower → iii) Reproduction
b) Leaf → ii) photosynthesis
c) Stem → iv) bears branches
d) Root → v) Anchorage
10) Boojho wanted to test the presence of starch in leaves. He performed the following steps.
A) He took a leaf and boiled it in water.
B) 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.
Answer:- Boojho did not boil the leaf in the spirit. Thus the chlorophyll is not removed from the leaves . Therefore he did not get the expected result.
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.
Answer:- No. The leaf will not store any more starch in it and will not turn blue black. Because it was kept in dark room for few days that time the food stored in the form of starch was used by the plant. And new fresh starch is not formed because sunlight was not available in the dark room. Therefore leaf will not turn blue black.
12) Can the stem of a plant be compared with a street with two – way traffic? Give reason.
Answer:-
Yes, way of plant can be compared with the street with two- way traffic. Because, on the street with two way traffic , vehicles come and go from same path.
Same as in the roots, the Transportation of the water and minerals goes upwards and food formed in the leaves move downwards.
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Long Answer Questions
13) Read the function of parts of a plant given below :-
In the diagram given fig. 7.1 write the names of the parts whose functions you have just read at the appropriate space.
a) Fixes plant to the soil.
Answer:- Roots.
b) Prepare starch
Answer:- Leaf
c) Takes part in reproduction.
Answer:- flower
d) Supports branches and bears flowers
Answer:- stem
14) Draw the veins of leaves given in fig. 7.2 below and write the type of venation.
Answer:-
Picture showing venation of the given leaves.
15) Observe fig. 7.3 and attempt the questions that follow it.
a) Label the parts 1, 2, 3 and 4 in the diagram.
b) What type of venation does the leaf has ?
Answer:- leaf shown in figure have Reticulate venation
c) What type of venation is seen in grass leaves ?
Answer:- grass seen in the figure has the parallel venation.
16) Observe the picture of an activity given as fig. 7.4 carried out with leaves of plants and polythene bag. Now answer the following :
a) Which process is demonstrated in the activity?
Answer:- The process of Transpiration is demonstrated in the given activity. Water in the form of small droplets comes out of stomata.
b) When will this activity show better results – on a bright sunny day or a cloudy day?
Answer:-On the bright sunny day the process of Transpiration will be faster. Due to heat water from the stomata of leaves will come out faster.
c) What will you observe in the polythene bag after a few hours of setting up the activity?
Answer:-
We will observe small droplets of water inside the polythene bags. This is due to Transpiration process.
d) Mention any one precaution you must take while performing this activity?
Answer:- while performing this activity we should take precaution that the polythene bag must be dry and plant twig must be fresh with 8-10 leaves on it.
17) Identify the wrong statements and correct them.
a) Anther is a part of the pistil.
Answer:- wrong
anther is a part of stamen.
b) The visible parts of a bud are the petals .
Answer:- wrong
Sepals are the visible part parts of a bud.
c) Lateral roots are present in a tap root.
Answer:- Right
d) Leaves perform the function of transpiration only.
Answer:- wrong.
Leaves also perform the function of photosynthesis.
18) Solve the Crossword given in fig. 7.5 as per the clues given below it:
Across-
1) The term that describes upward movement of water in a stem.
2) The part of leaf which is attached to the stem.
3) 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.
3) Is the board of leaf.