These AP 6th Class Science Important Questions 4th Lesson Getting to Know Plants will help students prepare well for the exams.
Getting to Know Plants AP 6th Class Science 4th Lesson Important Questions and Answers
Very Short Answer Questions (2 Marks)
Question 1.
What are climbers ? Give two examples.
Answer:
1. The plants that take support of neighbouring structures and climb up are called; climbers. They have weak stems.
2. Leaves are modified into tendrils.
3. Examples are grapes, money plant, beans.
Question 2.
What are the main functions of a leaf?
Answer:
1. The extra water from the plant is sent out in the form of water vapour from the leaves. This is known as transpiration.
2. Leaves are the sites of photosynthesis. Hence, food is prepared in leaves. So, they are called “food factories of the plant”.
Question 3.
Why do we see dew drops on the leaves in the early morning?
Answer:
At night, the water lost by leaves does not get evaporated and gets collected on the leaves in the form of dew drops.
Question 4.
What are the important parts of plant ?
Answer:
1. Roots
2. Stem
3. Leaves
4. Flower and
5. Fruit are the important parts of a plant.
Question 5.
What is the relation between the type of root system and venation?
Answer:
1. Reticulate venation is present only in dicot plants which have taprbot system.
2. Parallel venation is seen only in monocot plants which have fibrous root system.
Question 6.
What will happen if a plant doesn’t have any leaves?
Answer:
1. If a plant does not have any leaves, the process of gaseous exchange, transpiration and photosynthesis are affected.
2. In case of a crop plant, the yield of the plant will be reduced and the plant will ultimately die.
Question 7.
John has no sufficient place around his house to grow plants. But he wants to grow vegetables like tomato or brinjal. Suggest him some ways to grow plants.
Answer:
1. Some fertile soil is taken in a pot or a polythene, bag.
2. Tomato plant is planted in this soil.
3. This plant with this arrangement is put in the front yard of the house where sun light falls.
4. This arrangement can also be put on the terrace of the house.
Question 8.
How will you tell which part of a plant is the stem and which is the root?
Answer:
1. The part of the plant which grows vertically above the ground and which provides strength is known as stem.
2. The part of the plant which grows under the soil and absorbs the water and mineral salts from the soil is known as root.
Question 9.
How does the stem help the plant?
Answer:
1. The stem supports leaves, branches, flowers and fruits.
2. The stem transports the water and minerals from the roots to various parts of the plants.
Question 10.
What are the functions of roots in plants?
Answer:
1. Roots are mostly the underground part of the plant.
2. They absorb water and minerals from the soil.
3. They hold the soft firmly to keep the plant upright.
4. Some roots store food and become plump.
Question 11.
What is venation? Mention the types of venation found in leaves.
Answer:
Venation: The pattern of veins on the leaves is called venation.
Types of Venation: Two types of venation are found.
- A. Reticulate Venation: if the venation is net like structure on both sides of midrib, it is called reticulate Venation, e.g.: Pipal.
- B. Parallel Venation: In the leaves of grass the veins are parallel to one another. Such a venation is called parallel Venation.
Question 12.
How can you say that a potato is stem although it grows under the ground? Think it over.
Answer:
1. Potato stores food material in the stem due to which the stem bulges in size.
2. We think that these are all roots.
3. Actually they are modified stems.
Question 13.
Identify the structure seen in the figure and write a two sentences about it.
Answer:
This is a fibrous root.
- Roots are grown from the base of the stem.
- These roots are found in the plants having parallel venation in leaves. Ex: Grasses.
Question 14.
Draw a neat and labelled diagram of a plant.
Answer:
Question 15.
Draw the neat and labelled diagram of leaves showing parallel and reticulate venation.
Answer:
Question 16.
Draw a neat and labelled diagram of stamen of a flower.
Answer:
Question 17.
Draw a neat and labelled diagram of pistil of a flower.
Answer:
Question 18.
Draw a neat and labelled diagram of inner structure of an ovary.
Answer:
Question 19.
Observe the plants in the picture. Name the plants based on their characters.
Answer:
a) Herb
b) Shrub
c) Tree
Question 20.
Observe the plants in the pictures shown above. Name the plants based on their characters.
Answer:
a) Creepers
b) Climbers
Question 21.
Observe the following picture and label the parts X, Y and Z.
Answer:
X is stem
Y is petiote
Z is lamina
Question 22.
Observe the following figure and answer the questions.
1) What is the reason for the appearance of water drops in the polythene bag cover?
2) Can you name the phenomenon happened in the above plant ?
Answer:
1. Water comes out of the leaves in the form of vapour. So, water drops appeared in the polythene cover bag.
2. Transpiration.
Question 23.
Name the materials and apparatus required to test the presence of starch in leaves.
Answer:
We would require
- Leaf
- Spirit
- A beaker
- Test tube
- Burner
- Water
- Watch glass
- Iodine solution.
Question 24.
Mention the chemicals required to test the presence of starch in leaves.
Answer:
1. Iodine solution
2. Spirit
Question 25.
“I am a vital part in the plant body.
I prepare food for the plant.
I participate in the process of transpiration.”
Who am I?
Answer:
Leaf.
Question 26.
What is photosynthesis ? What is the end products of photosynthesis ?
Answer:
1. Leaves prepare their food in the presence of sunlight and a green coloured substance present in them. They also use water and carbon dioxide. This process is called photosynthesis.
2. The end products of photosynthesis are starch and oxygen.
Question 27.
Give some examples for edible roots.
Answer:
1. Carrot
2. Radish
3. Sweet potato
4. Turnip and
5. Tapioca.
Question 28.
Look at the following figure.
Write your findings by observing the above figure.
Answer:
1. Stem is like a street with two way traffic.
2. The water and minerals absorbed by the roots are transported to the leaves through stems.
3. At the same time, the food prepared in leaves by photosynthesis is transported through all parts of the plants via stem.
Question 29.
Give examples for groups of flowers but seemed to be a single flower.
Answer:
1. Marigold
2. Chrysanthemum and
3. Sun flower are not single flowers but groups of flowers.
Question 30.
Draw a neat labelled diagram showing petals and sepals in a bud and a flower.
Answer:
Question 31.
Write your findings after observing the structure of different flowers.
Answer:
1. The structure of the flower is not always the same.
2. The number of sepals, petals, stamens and pistils may also be different in different flowers.
3. Some of these parts may even be absent at times.
Question 32.
Answer the following.
1. “I am the vital part of the plant body and gives mechanical strength and provide water and minerals. Some times, I store food also” – Who am I ?
2. “I am a two way traffic street. I transport water and food in the plant body” Who am I ?
Answer:
1. Root
2. Stem
Question 33.
Answer the following.
1) “I am a creeper. My fruits have lot of water in them. People love to eat us in summer” – Who am I ?
2) “I am a climber. My fruits are very tasty and they are in bunches. They are used to prepare wine also” – Who am I?
Answer:
1. Watermelon
2. Grape vine
Short Answer Questions (3 Marks)
Question 1.
Correct the following statements and rewrite them.
i) Stem absorbs water and minerals from the soil.
ii) Leaves hold the plant upright.
iii) Roots conduct water to the leaves.
iv) The broad green part of leaf is called petiole.
Answer:
i. Root absorbs water and minerals from the soil.
ii. Roots hold the plant upright.
iii. Stem conducts water to the leaves.
iv. The broad green part of leaf is called Lamina
Question 2.
Select leaves (showing reticulate venation and those showing parallel venation from the list given below and write them in the tabular form.
Answer:
| Reticulate venation | Parallel venation |
| 1. Neem | 1. Grass |
| 2. Mustard | 2. Wheat |
| 3. Rose | 3. Rice |
| 4. Tulsi | 4. Sugarcane |
| 5. Methi | |
| 6. Mango | |
| 7. Dhania |
Question 3.
Observe the figure of an activity shown here and now answer the following.
i) Which process is demonstrated in the activity ?
ii) When will this activity show better results on a bright sunny day or a cloudy day?
iii) What will you observe in the polythene bag after a few hours of setting up the activity ?
iv) Mention any one precaution you must take while performing this activity ?
Answer:
i. The process demonstrated in the activity is transpiration.
ii. Sunny day.
iii. We will see a number of small water droplets on the inner side of the polythene bag.
iv. While performing this activity, we have to see that the polythene bag should be clean and dry and its mouth should be sealed properly to make the set-up airtight.
Question 4.
Explain the difference between tap roots and fibrous roots with the help of diagrams.
Answer:
Question 5.
Roots are necessary to keep the plants healthy and alive. Do you support this statement ? Why ?
Answer:
1. Yes, I support this statement.
2. Roots absorb water and minerals from the soil.
3. They are essential for the preparation of food in leaves.
4. Hence, roots are necessary to keep the plant healthy and alive.
Question 6.
Complete the following table.
| Part of the plant | Function performs |
| 1. Root | |
| 2. Leaf | |
| 3. Stem | |
| 4. Flower |
Answer:
1. Absorption of water and minerals from the soil and fixes the plant in the soil.
2. Prepares food by photosynthesis.
3. Supports branches and bears flowers, conducts water and food to different plant parts.
4. Takes part in reproduction.
Question 7.
Complete the following table.
| Name of the plant | Type of root system | Type of venation |
| 1) Maize | ||
| 2) Tamarind | ||
| 3) Wheat | ||
| 4) Coconut | ||
| 5) Mango | ||
| 6) Papaya |
Answer:
| Name of the plant | Type of root system | Type of venation |
| 1) Maize | Fibrous root | Parallel venation |
| 2) Tamarind | Tap root | Reticulate venation |
| 3) Wheat | Fibrous root | Parallel venation |
| 4) Coconut | Fibrous root | Parallel venation |
| 5) Mango | Tap root | Reticulate venation |
| 6) Papaya | Tap root | Reticulate venation |
Question 8.
What are the modifications of stem ?
Answer:
Stem is modified to perform certain special functions. They are :
- Storage of food
- Provide support
- To prepare food
- Storage of water.
Question 9.
If the leaves have reticulate venation what would be the type of root ?
Answer:
If the leaves have reticulate venation, the root system will be “Tap root system”.
Question 10.
How does the stem help the plant ?
Answer:
1. The stem supports leaves, branches, flowers and fruits.
2. The stem transports the water and minerals from the roots to various parts of the plants.
Question 11.
Complete the following table by observing the venation of the leaves in different plants.
| S.No. | Name of the Plant | Venation (Reticulate / Parallel) |
| 1. | ||
| 2. | ||
| 3. | ||
| 4. | ||
| 5. |
Answer:
| S.No. | Name of the Plant | Venation (Reticulate / Parallel) |
| 1. | Tulasi | Reticulate |
| 2. | Grass | Parallel |
| 3. | Maize | Parallel |
| 4. | Sugarcane | Parallel |
| 5. | Neem | Reticulate |
Note:
1. If the design is net-like on both sides of the midrib, the venation is reticulate.
2. If the veins are parallel to one other, the venation is parallel venation.
Question 12.
What are the important parts of a plant?
Answer:
The important parts of a plant are:
- Roots
- Stem
- Leaves
- Flower
- Fruit
Question 13.
Write down two examples of trees, shrubs, herbs and creepers growing around your house.
Answer:
1. Trees: Tamarind, Neem, Oak.
2. Shrubs: Hibiscus (China Rose), Jasmine
3. Herbs: Tomato and wheat
4. Creepers: Pumpkin and watermelon
Question 14.
Rani wanted to test the presence of starch in leaves. For this, she took a leaf and boiled in water. Later, she placed it in a petridish and poured some drops of iodine over it. She didn’t get the expected result. What step did she miss? Can you help her to get the correct result ?
Answer:
1. Yes, I will help her to get the correct result.
2. In her experiment, she missed the important step in the procedure.
3. She didn’t boil the leaf in spirit to remove chlorophyll. It is necessary to remove chlorophyll because it interferes with the test for starch.
4. It is also necessary to remove chlorophyll from leaves so that the leaves get discoloured.
Question 15.
Look at the figure, who do you think is watering their plant correctly Paheli or Boojho? Why ?
Answer:
1. Paheli is watering the plants correctly.
2. She is sprinkling water on the roots from where it can travel to all other parts of the plant.
Question 16.
Complete the following table.
Answer:
| Plant part | Function | |
| 1. Roots | Fixes plant to the soil | |
| 2. Leaves | Prepares starch | |
| 3. Flower | Take part in reproduction | |
| 4. Stem | Supports branches and bears flowers | |
Question 17.
Draw the veins of the leaves given in figure below and write the type of venation.
Answer:
Long Answer Questions (5 Marks)
Question 1.
Explain the parts of a leaf with the help of a diagram.
Answer:
1. Midrib: It is the thick vein in the middle of the leaf.
2. Lamina: The flat, green portion of the leaf is called the lamina.
3. Veins: The lines we observe on the leaf are called veins.
4. Petiole: The lamina is attached to the stem by a narrow, short stalk called the petiole.
5. Leaf base: It is the part which acts as the base for the leaf.
Question 2.
Explain the various parts of a plant with the help of a diagram.
Answer:
1. Flower: It is usually the most attractive part of the plant.
2. Leaf: The important part of the plant. Here transpiration and photosynthesis take place.
3. Fruit: This is the yield of the plant.
- After fertilization, the ovary of the flower swells up and forms the fruit.
- Embryo surrounded by a hard wall is called the seed. The seed contains a store of food.
4. Stem:
- The stem of a plant bears leaves, buds, flowers, fruits etc.
- Conducts water from roots to the leaves and to the other parts and food from leaves to the roots.
5. Roots:
- Roots absorb water and minerals from the soil.
- Roots hold the plant upright.
- Some roots transform to store the food.
Question 3.
How does the stem help the plant ?
Answer:
Functions of stem :
- Gives support to branches, leaves and fruits.
- Establishes connection between roots and leaves.
- Supplies water and minerals dissolved in water from roots to leaves, flowers and fruits.
- Supplies the food material prepared in the leaves to roots and other parts of the plant.
- In young plants, the stem also performs photosynthesis.
- In some plants, the stem stores the food material. Eg: Sugarcane, turmeric, ginger, potato, garlic.
- In desert plants, the stem performs photosynthesis. Eg: Opuntia, Cactus.
- Gives support to climbers
Question 4.
What do you mean by leaf venation? Explain various types of leaf venation with example.
Answer:
Leaf venation:
1. The design made by veins in a leaf is called leaf venation.
2. There are two types of leaf venation.
- Reticulate venation: If the design of veins makes a net like structure on both the sides of midrib, then it is called reticulate venation. Eg: Mango leaf, Gram leaf.
- Parallel venation: If the veins are parallel to each other or to midrib, then such type of venation is called parallel venation. Eg: Wheat leaf, Paddy leaf.
Question 5.
Explain the structure of a typical flower with the help of a diagram.
Answer:
A typical flower contains the following parts.
1. Stalk: A part by which a flower is attached to the branch, is called stalk.
2. Sepals: The small green leaf like structures of the flower are called sepals.
3. Petals: The big, coloured leaf like structures are called petals. Different flowers have petals of different colours.
4. Stamen: It is the male part of the flower. It has two parts.
- Filament
- Anther
5. Pistil: The innermost part of a flower is called a pistil. It has 3 parts.
- Stigma
- Style and
- Ovary. It is the female part of the flower.
Case Based Questions (4 Marks)
1. Study the following paragraph carefully and answer the questions given below.
Datura plant has bell shaped flowers. So, the petals have to be cut length wise, and spread out so that the inner parts can be seen clearly. Remove the sepals and petals to see the stamens and pistil in your flower.
Question 1.
The shape of Datura flowers is ( )
A) Dumbell shaped
B) Cup shaped
C) Bell shaped
D) Oval shaped
Answer:
C) Bell shaped
Question 2.
The main function of sepals in a flower is ( )
A) Protection
B) Attracting insects
C) Pollination
D) Fertilisation
Answer:
A) Protection
Question 3.
Which part of the flower attracts insects for pollination ….. ( )
A) Sepals
B) Petals
C) Stamen
D) Pistil
Answer:
B) Petals
Question 4.
The male part of the flower is ….. ( )
A) Stamens
B) Pistil
C) Petals
D) Sepals
Answer:
A) Stamens
Question 5.
The inner most part of the flower is ……….( )
A) Stamens
B) Pistil
C) Stalk
D) Petals
Answer:
B) Pistil
2. Read the following information carefully and answer the questions.
Plants have two types of roots. The main root is called tap root and the smaller roots are called lateral roots. Some plants do not have taproot and all roots seem similar and these are called “fibrous roots”.
Question 1.
We can see the taproot system is – ( )
A) Mango
B) Barley
C) Wheat
D) Maize
Answer:
A) Mango
Question 2.
We can see fibrous root system in – ( )
A) Neem
B) Peepal
C) Hibiscus
D) Barley
Answer:
D) Barley
Question 3.
Taproots plants show – ( )
A) Parallel venation
B) Reticulate venation
C) Both venation
D) None of the above
Answer:
B) Reticulate venation
Question 4.
Fibrous root plants show – ( )
A) Reticulate venation
B) Parallel venation
C) Both A and B
D) None of the above
Answer:
D) None of the above
Question 5.
The main function of the root is – ( )
A) To fix the plant in the soil.
B) To absorb water and minerals from soil
C) To store food
D) A and B
Answer:
A) To fix the plant in the soil
3. Study the following experimental setup carefully and answer the questions.
Question 1.
What is the aim of the experiment? ( )
A) To test the presence of starch in leaf.
B) Carbondioxide is required for photosynthesis.
C) Sunlight is necessary for photosynthesis.
D) Oxygen is evolved during photosynthesis.
Answer:
A) To test the presence of starch in leaf.
Question 2.
What are the chemicals required to conduct this experiment? ( )
A) Iodine
B) Spirit
C) Potassiur Hydroxide
D) A and B
Answer:
D) A and B
Question 3.
Why the leaf is boiled in spirit? ( )
A) To remove starch
B) To remove oxygen from water
C) To remove chlorophyll
D) To remove veins of the leaf
Answer:
C) To remove chlorophyll
Question 4.
When iodine is added to starch It indicates ….. colour. ( )
A) Blue black
B) Green black
C) Yellow
D) Black and white
Answer:
A) Blue black
Question 5.
What is the end product of photosynthesis? ( )
A) Glucose
B) Oxygen
C) Carbondioxide
D) A and B
Answer:
D) A and B
4. Read the following information carefully and answer the questions.
Question 1.
Transpiration occurs through ….. ( )
A) Roots
B) Stem
C) Leaves
D) Flowers
Answer:
C) Leaves
Question 2.
During the summer, when we sit under a tree, we feel very cool. What is the reason for this? ( )
A) Tree gives shade for us.
B) Tree releases water vapour during transpiration.
C) We get cool breeze.
D) None of the above
Answer:
B) Tree releases water vapour during transpiration.
Question 3.
What experiment did you conduct to prove transpiration In your school laboratory? ( )
A) Plant – polytherie bag experiment
B) Black paper experiment
C) Plant – Red ink experiment
D) Hydrilla plant experiment
Answer:
A) Plant – polytherie bag experiment
Question 4.
Transpiration helps in ….. ( )
A) Evaporation
B) Rainfall
C) Cool Breeze
D) Transportation of food
Answer:
B) Rainfall
Question 5.
Transpiration does not occur in ….. ( )
A) Desert plants
B) Water plants
C) Grass plants
D) Forest plants
Answer:
A) Desert plants
5. Read the information carefully and answer the questions.
Plants with green and tender stems are called herbs. They are usually short and may not have branches: Some plants develop branches near the base of the stem. The stem is hard but not very thick are called shrubs. Some plants are very tall and have the stem are called tree.
Question 1.
Example for herb is ….. ( )
A) Mango
B) Tamarind
C) Peepal
D) Tomato
Answer:
D) Tomato
Question 2.
Example for shrub is ….. ( )
A) Lotus
B) Tomato
C) Mango
D) Hibiscus
Answer:
D) Hibiscus