Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 3 Plants

I. Choose the correct answer.

Question 1.
The function of leaf is to ________.
(a) Give Support
(b) Fix the plant firmly
(c) Produce food
(d) None of the above
Answer:
(c) Produce food

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Question 2.
An example for taproot is _______.
(a) Paddy
(b) Grass
(c) Mango
(d) Ragi
Answer:
(c) Mango

Question 3.
________ supports the plant.
(a) Root
(b) Leaf
(c) Flower
(d) Stem
Answer:
(d) Stem

Question 4.
Most plants grow from the ________.
(a) root
(b) leaf
(c) flower
(d) seed
Answer:
(d) seed

Question 5.
Roots are poorly developed in _________.
(a) agaya thamarai
(b) neem
(c) teak
(d) date palm
Answer:
(a) agaya thamarai

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Question 6.
If part X will be absent in a plant, new plants will not be produced. X is _________.
(a) stem
(b) root
(c) flower
(d) leaves
Answer:
(c) flower

Question 7.
The plant is adapted to grow in deserts as it has ________.
(a) fleshy stem
(b) needle like roots
(c) leaves changed to spine
(d) both a and c
Answer:
(d) both a and c

Question 8.
An example of many seeded fruit is ________.
(a) pomegranate
(b) mango
(c) apricot
(d) peach
Answer:
(a) pomegranate

Question 9.
Which of the following plant parts take part in absorption of water and exchange of gases respectively?
(a) P and R
(b) R and S
(c) S and Q
(d) T and P
Answer:
(d) T and P

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

II. Find the odd one.

Question 1.
(a) Carrot
(b) Radish
(c) Tomato
(d) Beetroot
Answer:
(c) Tomato

Question 2.
(a) Cabbage
(b) Greens
(c) Turmeric
(d) Spinach
Answer:
(c) Turmeric

Question 3.
(a) Neem
(b) Aloe vera
(c) Datepalm
(d) Opuntia
Answer:
(a) Neem

Question 4.
(a) Coconut
(b) Mango
(c) Apricot
(d) Orange
Answer:
(d) Orange

Question 5.
(a) Hydrilla
(b) Opuntia
(c) Water hyacinth
(d) Vallisneria
Answer:
(b) Opuntia

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

III. Short answers.

Question 1.
Name the parts of a plant.
Answer:
The basic parts of a plant are root, stem, leaf, flower, fruit and seed.

Question 2.
Name the types of roots.
Answer:
They are of two main types:

  1. tap root and
  2. fibrous root.

Question 3.
Write any two functions of the leaves.
Answer:

  • Leaf prepares food for the plant with the help of water, carbondioxide and in the presence of sunlight and chlorophyll.
  • The loss of water in the form of gas (water vapour) happens through the tiny pores in the leaves.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Question 4.
Write the parts of a flower.
Answer:

  • Stamen,
  • Pistil,
  • Petal,
  • Sepal

Question 5.
Name the types of plants based on thier habitat
Answer:

  • Land (Terrestrial) plants
  • Water (aquatic) plants

Question 6.
Write any two adaptations of desert plants.
Answer:

  • Leaves are changed to spines to reduce the loss of water.
  • The stem is green and fleshy. They store water and produce food.

Question 7.
Write the names of some water plants.
Answer:

  • Water hyacinth (Agaya thamarai),
  • Pistia.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

IV. Answer the following questions.

Question 1.
Write any two functions of each:
(a) Stem _________, _________
Answer:
Supports, Transports

(b) Root _________, _________
Answer:
Fixation, Absorption

(c) Flower _________, _________
Answer:
Develops, Reproduce

Question 2.
Why is leaf called food factory of the plant?
Answer:
Leaf prepares food for the plant with the help of water, carbon dioxide and in the presence of sunlight and chlorophyll. This process is called photo synthesis. Hence, it is called the food factory of the plant.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Question 3.
Differentiate between taproot and fibrous root.
Answer:

S.No Taproot Fibrous root
1. Thick main root that goes deep into the soil. No main root and the roots do not go deep into the soil.
2. Side roots are developed from the main root. Roots are developed from the base of the stem.
3. Looks like a long tap E.g., Tamarind, Guava. Looks like a bunch. E.g., Corn, Sugarcane.

Question 4.
Give two examples of :
(a) Fruit having only one seed
(b) Fruit having many seeds
Answer:
(a) Some fruits have only one seed.
E.g., Apricot, Mango, Coconut and Peach.

(b) Some fruits have many seeds.
E.g., Papaya, Watermelon and Orange.

Question 5.
Name two free floating plants.
Answer:

  1. Water hyacinth (Agaya thamarai)
  2. Pistia.

Question 6.
Look at the picture of a water lily.
(a) Which parts of the plant can you see?
(b) Where are the plant’s roots and stem?
Answer:
(a) Flower, Leaf
(b) The plant’s roots and stem are in the bottom of the water bodies.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

In-Text Activity:

Warm-up (Text Book Page No. 58):

Unscramble the words and label the parts of the plant.
(ETSM, TORO, ELFA, FURTI, LOFEWR, SDEE)

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 1

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 2

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Let us Do (Text Book Page No. 60):

Take two small potted plants. Cut the root of one of the plants and fix ¡t in the pot. Now water the plants for two to three days. You will observe that the plant without roots will wilt and die. In the absence of roots, plants die.

This activity proves that the function of the roots is to absorb ________ and _______ from the soil.
Answer:
Water, Minerals

Let us Write (Text Book Page No. 60):

True or False

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 3

Question 1.
The roots grow into the soil.
Answer:
True

Question 2.
Fibrous root has a main root.
Answer:
False

Question 3.
Root absorbs water from soil.
Answer:
True

Question 4.
Potato stores food in its root.
Answer:
False

Question 5.
Grass has fibrous roots.
Answer:
True

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Fill in the blanks.

Question 1.
_____________ grows towards the sunlight.
Answer:
Stem

Question 2.
Leaves originate from the _____________ .
Answer:
surface of the stem

Question 3.
Green part of the plant that makes food is called _____________ .
Answer:
leaf

Question 4.
_____________ gives support to the whole plant.
Answer:
Stem

Question 5.
Water from soil is absorbed by the _____________ of the plant.
Answer:
root

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Think and Write

Question 1.
List out the fruits that do not have seeds. _____________ .
Answer:
Pineapple, Banana

Question 2.
Write down the names of the fruit trees that you have never seen0 but have tasted their fruits. ___________________ .
Answer:
Strawnerry tree, Plum tree, Pear tree

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Let us Do

Connect the leaf with its fruit.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 4
Answer:
Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 5

Let us Connect

Match the plants with their living places.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 6
Answer:
Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 7

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Let us Try

A. Select the ‘INCORRECT’ statement from the following.

1. Desert plants grow in hot, dry and sandy places.
2. Plants in coastal areas tolerant to saline water.
3. Mountain plants have needle like leaves.
4. Teak is an example of desert plant.
Answer:
4. Teak is an example of desert plant.

B. Tick (✓) the odd one.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 8
Answer:
Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 9

C. Circle the places which are land habitats.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 10
Answer:
Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 11

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

Let us Try

A. Mark “L” for land plants and W’ for water plants.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 12
Answer:
Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 13

B. Colour the water hyacinth plant.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 14
Answer:
Activity to be done by the students

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

C. Write true or false.

Question 1.
Fixed rooted plants are present in water bodies.
Answer:
True

Question 2.
Leaves of lotus are submerged in the water.
Answer:
False

Question 3.
Lotus plants are found in many ponds.
Answer:
True

Question 4.
Water hyacinth freely float with the help of a spongy body filled with air.
Answer:
True

Samacheer Kalvi 3rd Standard Science Guide