Text Book Back Questions and Answers - Chapter 3 Plants Term 2 4th Science Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

Updated On May 15, 2024

By SaraNextGen

Chapter 3 - Plants - Term 2 - 4th Science Guide Samacheer Kalvi Solutions

Text Book Back Questions and Answers
I. Choose the correct answer:
Question $1 .$
The tip of the leaf is
(a) Blade
(b) Apex
(c) Midrib
(d) Veins
Answer:
(b) Apex
 

Question 2,
Which one of the following is a primary producer?
(a) Plant
(b) Animal
(c) Human
(d) None of the above
Answer:
(a) Plant
 

Question $3 .$
Which flower blooms during winter?
(a) Jasmine
(b) Tulip
(c) December
(d) Fire cracker
Answer:
(c) December

Question $3 .$
Choose the ornamental plant from the list.
(a) Parthenium
(b) Mango
(c) Travellers palm
(d) Groundnut
Answer:
(c) Travellers palm

Question $4 .$
Which plant flower is edible?
(a) Cauliflower
(b) Potato
(c) Mint
(d) Cabbage
Answer:
(a) Cauliflower

II. Fill in the blanks :
Question $1 .$
During photosynthesis ______ is produced and stored in the leaf.
Answer:
Food

Question $2 .$
Green plants have ______ pigment.
Answer:
Green

Question $3 .$
Onion is a ______ part of a plant.
Answer:
Stem

Question $4 .$
The male part of the flower is _____
Answer:
Stamen

Question $5 .$
An example for edible seed is______
Answer:
Rice

III. Answer the following in one or two words :
Question $1 .$
Which is the female part of the plant?
Answer:
Pistil.

Question $2 .$
Write the name of any one of the leaf that is used as a food.
Answer:
Cabbage.

Question $3 .$
Which flower bud is used as spices in food?
Answer:
Cloves.

Question $4 .$
What are the nutrients present in the seeds?
Answer:
Carbohydrates and proteins.

Question $5 .$
Write any one of the flower that blooms in summer.
Answer:
Sunflower.
 

IV. Answer briefly:
Question $1 .$
Write the parts of the leaf.
Answer:
1. Apex
2. Veins
3. Midrib
4. Blade
5. Petiole
 

Question $2 .$
Define - Photosynthesis.
Answer:
Photosynthesis is a process by which plants make their food using chlorophyll, water, carbon dioxide in the presence of sunlight.

Question $3 .$
Write the names of the exotic plants.
Answer:
1. Sago palm (Cycas)
2. Fern
3. Crotons
4. Travelers palm
5. Boat lily
6. Aloevera
 

Question $4 .$
Write the names of any two underground stem plant.
Answer:
Potato and Onion are underground stem plants.
 

Question $5 .$
Why should we not touch parthenium plant?
Answer:
The pollen of parthenium plant is allergic in nature, so, we do not touch this plant.

V. Answer detail :
Question $1 .$
Mask any four parts and describe the parts of a leaf.
Answer:

Blade: The broad flat part of the leaf (Lamina).
Apex: The tip of the leaf.
Midrib: The midrib runs along the centre of the leaf.
veins: Veins are branch out from the midrib. They are the framework of hollow tubes that carry water and minerals.
Petiole: This part joins the leaf to the main stem.

Question $2 .$
Draw a diagram of a flower and explain the parts of a flower.

Answer:

the four visible parts of a flower are explained below.
Sepal: Sepals are leaves that protect the flower while it is still a bud. Sepals are usually green in colour.
Petal: Petals are often bright coloured. Their main job is to attract insects such as bees or butterflies, to the flower. The insects help the flowers in the transfer of pollen grains. Stamen: Stamen can be seen at the centre of a flower. They contain pollen grains that help the plants to multiply. It is the male part of a flower.
Pistil: Pistil is also seen at the centre of the flower. The pistil uses the pollen to help the flower become the fruit. It is the female part of a flower.

InText Questions and Answers
Think and Answer (Text Book Page No. 78)
Question $1 .$
Which part of the leaf collects carbon dioxide?
Answer:
Stomata, the small pores, found at the base of the leaf, collects carbon dioxide.

Question $2 .$
Which part of the leaf transports water?
Answer:
The vascular tissues, called xylem, transports water from the roots to the leaves.

Think and Answer (Text Book Page No. 79)

Question $1 .$
Why would living things not be able to live without plants?
Answer:
Humans and animals depend on plants for their food either directly or indirectly. So, things would not be able to live without plants.
 

Try to Answer (Text Book Page No. 79)
Fill in the blanks by rearranging the letters in the bracket :
Question $1 .$
During photosynthesis plants releases ______(egxyno).
Answer:
Oxygen
 

Question $2 .$
______is a primary producer, (tanpl).
Answer:
Plant
 

Question $3 .$
Stomata are seen in the ______ (owler) surface of the leaf.
Answer:
Lower

Question $4 .$
Pigment involved in the food synthesis is (phllylochor).
Answer:
Chlorophyll

Let us do (Text Book Page No. 79)

Take two potted plants. Keep one in sunlight and other in a fully covered box. Water them regularly. After a week observe the plants. 

Answer:

Let us do (Text Book Page No. 81)
Question $1 .$
List out the flowering and Non-flowering plants in your surrounding.

Answer:

Let us do (Text Book Page No. 82)
Question $1 .$
List out the places where you see the non-green plants
Answer:
Non-green plants grow on decaying organic matters such as cow-dung, wood, bread, etc. Mushroom, Bracket fungi grow in such places.

Try to Answer (Text Book Page No. 82)
Fill in the blanks:
Question $1 .$
______ is an example for non flowering plant.
Answer:
Algae/Fungi /Fern

Question $2 .$
Plants are classified based on pigment and ______ of the plant.
Answer:
Flower

Question $3 .$
______ depend on other organism to live and get their food.
Answer:
Plants
 

Question $4 .$
Autotrophs use ______, ______ and chlorophyll to prepare their own food.
Answer:
Atmosphere,light

III. Part of Flower :
Have you seen flowers? Try to answer the questions given below
Question $1 .$
Which is your favourite flower?
Answer:
Jasmine
 

Question $2 .$
What is the colour of the flower?
Answer:
White
 

Question $3 .$
How does it smell?
Answer:
A sharp, sweet smell

Try to Answer (Text Book Page No. 83)
Fill in the blanks:
Question $1 .$
Sepals ______ the flower while it is still a bud.
Answer:
Protect
 

Question $2 .$
Stamen contains ______ grains.
Answer:
Pollen
 

Question $3 .$
Pistil is ______ part of a flower.
Answer:
Centre
 

Let us do (Text Book Page No. 83)
Bring few hibiscus flowers to the classroom. Distribute the flowers to children. Introduce the parts of the flower to them. Then, ask them to observe and feel the different parts of the flower and tell them to record their observation.

Answer:

Think and Answer (Text Book Page No. 84)
Question $1 .$
Can you name the four seasons?
Answer:
Spring, Summer, Autumn and Winter.
 

Try to Answer (Text Book Page No. 86)
Find the odd one:
Question $1 .$
December, Tuberose, Tulip.
Answer:
Tulip

Question $2 .$
Saffron, Tulip, Rose.
Answer:
Rose
 

Question $3 .$
Crotons, Boat lily, Rose.
Answer:
Rose

Try to Answer (Text Book Page No. 88)
Fill in the blanks:
Question $1 .$
______flower is used as food.
Answer:
Banana
 

Question $2 .$
______part of the potato plant is used as food.
Answer:
Stem
 

Question $3 .$
Stem of the stores ______ food in it.
Answer:
plant

Question $4 .$
Seeds are rich in ______ and ______
Answer:
Carbohydrates, proteins

Let us do (Text Book Page No. 89)
Complete the table to show which parts of the plant we eat.

Question $1 .$

Answer:

Additional Questions and Answers
I. Choose the correct answer:
Question $1 .$
The ______ runs along the centre of the leaf
(a) Veins
(b) Midrib
(c) petiole
(d) Lamina
Answer:
(b) Midrib

Question $2 .$
The largest flower in the world is found in the rain forests of ______
(a) India
(b) Australia
(c) Indonesia
(d) South Africa
Answer:
(c) Indonesia

Question $3 .$
Bamboo plants can grow upto ______ in one day.
(a) $60 \mathrm{~cm}$
(b) $70 \mathrm{~cm}$
(c) $80 \mathrm{~cm}$
(d) $90 \mathrm{~cm}$
Answer:
(d) $90 \mathrm{~cm}$

II. Fill in the blanks with suitable answer :
Question $1 .$
The broad flat part of the leaf______
Answer:
Lamina

Question $2 .$

______helps the plants to breathe.
Answer:
Stomata

Question $3 .$

______ food is made in their green stems.
Answer:
Cactus
 

Question $4 .$
The largest flower in the world is ______
Answer:
Rafflesia

III. Write True or False :
Question $1 .$
The seasons are four.
Answer:
True

Question $2 .$
Bamboo plants can grow upto $70 \mathrm{~cm}$ in the day.
Answer:
False

IV. Answer briefly:
Question $1 .$
What are primary producers?
Answer:
As plants prepare food for themselves and also for other living things, they are called primary producers.
 

Question $2 .$
How are plants classified?
Answer:
Plants are classified in many ways based on stems, life span, seeds, flower and colour. In this session we will study about the classification of plants based on the flower and colour.

V. Answer briefly :
Question $1 .$
Differentiate : Flowering plants and Non-flowering plants

Answer: