Class-6 Science Chapter-7 Getting to Know Plants, Solutions and Additional Exercises in line with NCERT book / CBSE Syllabus

Chapter 7
Getting to Know Plants

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Additional Exercises

Exercises from Textbook

Tables from Textbook

Additional Exercises

Choose the correct answer:

1.    The part of a leaf by which it is attached to the stem is called:

a.    Petiole (√)

b.    Lamina

c.    Veins

2.    The broad, green part of the leaf is called:

a.    Petiole

b.    Lamina (√)

c.    Rib

3.    Design made by veins in the rib is called:

a.    Photosynthesis

b.    Transpiration

c.    Venation (√)

4.    Interconnected veins, which form a web like network is called:

a.    Reticulate venation (√)

b.    Parallel venation

c.    Both a and b

5.    Venation in the leaves of grass is:

a.    Reticulate venation

b.    Parallel venation (√)

c.    None of these

6.    Water comes out of leaves in the form of vapour by a process called:

a.    Vaporization

b.    Evaporation

c.    Transpiration (√)

7.    Leaves prepare their food in the presence of Sunlight and chlorophyll. They use water and carbon dioxide from air. Oxygen is given out in this process. This process is called:

a.    Photosynthesis (√)

b.    Respiration

c.    Transpiration

8.    Which part of the plant is said to anchor the plant to the soil?

a.    Stem

b.    Root (√)

c.    leaf

9.    Which of the following plant has fibrous roots?

a.    Wheat (√)

b.    Rose

c.    Gram

10. Small bead like structures inside the ovary are called:

a.    Style

b.    Stigma

c.    Ovules (√)

11. The coloured and fragrant part of flower is called:

a.    Sepal

b.    Petal (√)

c.    Stamen

12. Which of the following is the male reproductive organ of a flower?

a.    Stamen (√)

b.    Pistil

c.    sepal

13. The green pigment present in leaves and plants is called:

a.    Xanthophyll

b.    Chlorophyll (√)

c.    Bilirubin

14. The part of plant that attracts insects is:

a.    Calyx (sepal)

b.    Corolla (petal) (√)

c.    Stamen

Science Class-7

Answer the following questions in one word:

1.    The plants having soft and weak stem are called -
Herbs

2.    Plants Having hard but weak stem are called -
Shrubs

3.    Plants having thick and Woody stem are called-
T r e e s

4.    Plants having thread like structures are called-
Climber plants

5.    On which grow and spread on the surface of the land are called -
Creepers

Distinguish between:

(a) Herbs and Shrubs

(b) Climbers and Creepers

(a) Herbs and Shrubs

Herbs	shrubs
Herbs are small plants.	Shrubs are medium sized branched plants.
Size of herbs varies from a few millimeters to a few metres.	Shrubs are smaller than trees.
There is just one permanent stem present in herbs.	Many branches appear to be growing from bottom of shrubs.
Herbs have green, soft and weak stem.	Shrubs have hard but weak stem.
Herbs live for few months.	Shrubs live for many years.
Examples : mustard, rice	Examples : rose, bougainvillea

(b) Climbers and Creepers

Climber	Creepers
Plants with weak stems take support on neighbouring structures and climb up or called climbers.	plants with weak stem that cannot stand upright and spread on the ground are called Creepers.
Examples: bitter gourd, grapes money plant	examples: Pumpkin, muskmelon

Fill in the blanks:

1.    Rose is a shrub. (shrub / herb)

2.    Plants contain chlorophyll pigment. (hemoglobin / chlorophyll)

3.    Minerals dissolved in water move up in the stem, along with the water. (up / down)

4.    The food prepared by leaves ultimately gets stored in different parts of plant. (roots / leaves)

5.    Leaves lose water through transpiration. (photosynthesis / transpiration)

6.    Climbers climb up with the help of tendril. (tendril / root)

7.    The pistil is formed by the combination of stigma, style and ovary. (anther / ovary)

8.    At the end of photosynthesis, oxygen gas is released. (oxygen / carbon dioxide)

9.    Stamen is the male reproductive organ of a plant. (male / female)

Encircle the odd one:

1.    Carrot, radish, sweet potato, turnip, tapioca, onion.(modified roots)

2.    Style, stigma, ovary, anther, ovule (female reproductive parts)

3.    Onion, wheat, grass, rose, garlic (fibrous roots)

Match the columns:

A	B
Spiny leaves	Perennials
Woody stems	Lotus
Hollow stem	Radish
Biennials	Rose
Climber plant	Cactus
Biennial herb	Money plant

A	B
Spiny leaves	Cactus
Woody stems	Perennials
Hollow stem	Lotus
Biennials	Radish
Climber plant	Money plant
Biennial herb	Rose

Q. Name any five edible roots.
Ans- Names of five edible roots are as follows:

1.    Carrot

2.    Radish

3.    Sweet potato

4.      Turnip

5.      Tapioca

Draw the diagram of taproot and fibrous root.

Draw a labelled diagram of a flower.

Draw the diagram of a germinated seed.

Draw a labelled diagram showing different parts of a leaf.

Exercises from Textbook

Correct the following statements and rewrite them in your notebook.

1.    Stem absorbs water and Minerals from the soil.
Roots absorb water and Minerals from the soil.

2.    Leaves hold the plant upright.
Stem holds the plant upright.

3.    The number of petals and sepals in a flower is always equal.
The number of petals and sepals in a flower is not always equal.

4.    If the sepals of a flower are joined together, it's petals are also joined together.
If the sepals of a flower are joined together, its petals may or may not be joined together.

5.    If the petals of a flower are joined together, then the pistil is joined to the petal.
If the petals of a flower are joined together, then the pistil may not be joined to the petal.

Draw a leaf, a tap root and a flower you have studied.

Can you find a plant in your house or in your neighborhood, which has a long but a weak stem? In which category would you classify it?
Ans- There is a money plant in my house. It has a long but weak stem. Money plant falls in the category of climbers.

What is the function of a stem in a plant?
Ans- Following are the functions of a stem in a plant:

1.    Transportation of water and Minerals to different parts of the plant.

2.    Transportstion of food from leaves to different parts of plant.

3.    Storage of food material.

4.    Protection to the plant.

5.    Help plant stand upright.

6.    Production of food through photosynthesis in some plants.

Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander( dhania), china rose
Ans- Tulsi, coriander( dhanya) and China rose have reticulate venation. In these leaves veins are net-like on both sides of midrib.

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 to find out whether a plant has taproot or fibrous roots by looking at the impression of its leaves on a sheet of paper.
A plant with taproot will have reticulate venation while a plant with fibrous roots will have parallel venation in leaves.

Write the names of the parts of a flower.
Ans- Following are the names of the parts of a flower:

1.    Sepal - The outermost green leaf like part.

2.    Petal - The coloured and fragrant part of the flower.

3.    Stamen- Male reproductive part of flower.

4.    Pistil- Female reproductive part of flower.

Which of the following plants have you seen? Of that you have seen, which one have flowers?
Grass, Maize, wheat, chilli, tomato, Tulsi, pipal, sheesham, Bagnan, mango, Jamui, Guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut
Ans- All these are flowering plants.

Name the part of the plant which produces its food. Name this process.
Ans- Leaves have a green pigment called chlorophyll: this enables them to synthesise food from water and carbon dioxide, in presence of Sunlight. This process is known as photosynthesis. Oxygen is liberated in this process.
                                     _sunlight

Carbon dioxide+ water -------à  Food + oxygen.
                                     ^chlorophyll

In which part of a flower, you are likely to find the ovary?
Ans- We are likely to find ovary in is pistil. 

Name two flowers, each with joined and separated sepals.
Ans-  Names of flowers with joined sepals are:

1)    Periwinkle

2)    Hibiscus

Flowers with s e p e r a t e d sepals are:

1)    Rose

2)    Magnolia

Tables from Textbook

Table 7.1 Categories of plants

Plant name	Column 1 Height	Column 2 Stem				Column 3 Where do the branches appear		Column 4
		Green	Tender	Thick	Hard	At the base of the stem	Higher Up on the Stem	Category of Plant
Tomato	Shorter than me	Yes					Yes	Herb
Mango	Much taller than me			Yes	Yes		Yes	Tree
Lemon	Slightly taller than me				Yes	Yes		Shrub
Hibiscus	Slightly taller than me				Yes	Yes		Shrub
Holy basil	Shorter than me				Yes		Yes	Sub shrub
Rose	Slightly taller than me				Yes		Yes	Shrub
Spinach	Much smaller than me	Yes	Yes					Herb
Coriander	Much smaller than me	Yes	Yes				Yes	Herb
Jasmine	Taller than me				Yes	Yes		Shrub
Peepal	Much taller than me			Yes	Yes		Yes	Tree

Table 7.2 Types of roots and types of leaf venation

Name of plant	Types of leaf venation	Types of roots
Rice	Parallel	Fibrous
Wheat	Parallel	Fibrous
Maize	Parallel	Fibrous
Bamboo	Parallel	Fibrous
Onion	Parallel	Fibrous
Radish	Reticulate	Tap
Beet root	Reticulate	Tap
Carrot	Reticulate	Tap
Turnip	Reticulate	Tap

Table 7.3 Observations on flowers

Name of flower	Number and colour of petal	Number and colour of sepals	Are the sepals joined together or separated	Stamens – are they free or joined to petals	Pistil – Present / absent
Rose	Many, (White)	5, Green	Separate	Free	Present
Hibiscus	5, (Red)	6, Green	Joined	Free	Present
Magnolia
Jasmine
Lily
Periwinkle	5, Pink	5	Joined	Free	Present

Activity / Project

Become a leaf expert
Do this activity with a number of leaves over a period of few weeks. For every leaf that you wish to study. Pluck it and wrap it in a wet cloth and take it home. Now put your leaf in a newspaper and place a heavy book on it. You can also put it under your mattress or a trunk! Take out the leaf after a week. State on a paper and write a poem or story about it. With your leaf collection pasted in a book (a Herbarium), you can become quite an expert.

Names of plant parts are hidden in this grid. Search for them by going up, down, or even diagonally forward as well as backward. Have fun!

O	V	U	L	E	L	Y	T	S	T	E	M
V	E	I	N	W	Q	H	E	R	B	P	I
A	N	I	M	A	L	Z	E	X	R	N	D
R	F	I	L	A	M	E	N	T	M	U	R
Y	A	R	A	B	L	C	O	D	B	E	I
L	E	E	U	O	F	O	L	G	H	I	B
A	L	H	I	I	R	J	A	L	K	U	R
T	M	T	N	O	T	P	P	Q	R	R	A
E	E	N	S	T	U	F	E	H	V	W	N
P	Y	A	M	G	I	T	S	Z	Z	N	C
F	L	O	W	E	R	E	H	T	N	A	H
S	T	A	M	E	N	N	S	E	P	A	L

O	V	U	L	E	L	Y	T	S	T	E	M
V	E	I	N	W	Q	H	E	R	B	P	I
A	N	I	M	A	L	Z	E	X	R	N	D
R	F	I	L	A	M	E	N	T	M	U	R
Y	A	R	A	B	L	C	O	D	B	E	I
L	E	E	U	O	F	O	L	G	H	I	B
A	L	H	I	I	R	J	A	L	K	U	R
T	M	T	N	O	T	P	P	Q	R	R	A
E	E	N	S	T	U	F	E	H	V	W	N
P	Y	A	M	G	I	T	S	Z	Z	N	C
F	L	O	W	E	R	E	H	T	N	A	H
S	T	A	M	E	N	N	S	E	P	A	L