NCERT Solutions Std 6 Science Getting to Know Plants

Getting to Know Plants

Exercise:

1). Correct the following statements and rewrite them in your notebook.

a). Stem absorbs water and minerals from the soil.

     Root absorbs water and minerals from the soil.

b). Leaves hold the plant upright.

     Root hold the plant upright.

c). Roots conduct water to the leaves.

     Stem conduct water to the leaves.

d). The number of petals and stamens in a flower is always equal.

     The number of petals and stamens in a flower has no relation.

e). If the sepals of a flower are joined together, its petals are also joined together.

      If the sepals of a flower are joined together, its petals are not necessarily joined together.

f). If the petals of a flower are joined together, then the pistils is joined to the petals.

     If the petals of a flower are joined together, then the pistils are not necessarily joined to the petals.

2). Draw

a). leaf

b). a taproot

c) a flower

3). Can you find a plant in your house or in your neighbourhood, which has a long but weak stem? Write its name. In which category will you place it?

     Yes, money plant has a long but weak stem. It is a climber.

4). What is the function of a stem?

       The stem performs the following functions.

i). the stem transport water from roots to different parts of the plant.

ii). The stem transport food from leaves to different parts of the plant.

iii). It bears leaves, flowers and fruits.

5). Which of the following leaves have reticulate venation?

Wheat, tulsi, maize, grass, coriander (dhania), China rose

       Tulsi and China rose have reticulate venation.

6). If a plant has fibrous root, what type of venation do its leaves have?

     Parallel venation.

7). If a plant has leaves with reticulate venation, what kind of roots will it have?

     Tap root.

8). 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. If the leaf has the parallel venation then the plant has fibrous roots and if the leaf has the reticultate venation then the plant has tap root.

9). What are the parts of a flower?

     The parts of a flower are sepals, petals, stamens, anthers and pistil.

10). From the following plants, which of them have flowers?

Grass, maize, wheat, chilli, tomato, tulsi, peepal, shisham,  banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut.

     All the above mentioned plants have flowers.

11). Name the part of plant which produces food. Name the process.

     Leaves produce food for plant. The process is called as photosynthesis.

12). In which part of a flower, you will find the ovary?

     Ovary is found in pistil.

13). Name two plants in which one has joined sepals and the other has separate sepals.

     Datura and Bottle gourd have joined sepals and rose and marigold have separate sepals.

Additional Questions

 Fill in the blanks.

i). Plants with green and tender stems are called herbs.

ii). A prominent line on the middle of the leaf is called a midrib.

iii). Oxygen is given out in the process of photosynthesis.

iv). Roots anchor the plant to the soil.

v). The part of a leaf which is attached to the stem is called a petiole.

 True or false.

i). Plants with green and tender stems are called trees.

False.

ii). The broad, green part of the leaf is called the petiole.

False.

iii). Oxygen is given out in the process of photosynthesis.

True.

iv). All the plants have colourful flowers.

False

v). Roots holds the plant firmly in the soil.

True.

 

Distinguish between

i). tap root and fibrous roots.

Tap root Fibrous root
1. Tap root goes deep into the soil. 1. fibrous root do not go deep into the soil.
2. It has one main root and smaller roots grow from main root. 2. It do not have a main root.
3. Tap roots are found in the plants with reticulate venation. 3. Fibrous roots are found in the plants with parallel venation.

Answer the following

i). Name the types of plants.

     Plants are classified as trees, shrubs, herbs, climbers and creepers.

ii). Name the parts of the plants.

     Stem, roots, leaves, flowers and fruits.

iii). What are herbs?

     Plants with green and tender stems are called herbs. They are usually short and may not have many branches.

iv). What are creepers?

     The plants with weak stem that cannot stand upright and spread on the ground are called as creepers.

v). Write the types of the roots?

     Roots are of two types tap root and fibrous roots.

vi). What are the characteristics of trees?

The characteristics of trees are as follows

(i). the trees are very tall

(ii) the stem of the trees are thick and strong

(iii). The stems have branches in the upper part, much above the ground.

vii). What is a lamina?

The broad, green part of the leaf is called the lamina.

viii). What is the function of the roots?

The function of the roots are as follows.

(i) Roots anchor the plant to the soil.

(ii) they absorb water and minerals from the soil.

ix). Name the innermost part of the flower?

Pistil is the innermost part of the flower.

x). What do you mean by venation?

The design of the lines on the leaf is called as venation.

Define

i). transpiration

      The process by which water comes out from the leaves in the form of water vapour is called as transpiration.

Name the following

i). Types of venation

     parallel venation and reticulate ventation.

ii). Types of roots

tap root and fibrous roots.

iii). Eatable roots

carrot, sweet potato and raddish.

iv). Herbs

Tomato and potato

v) shrubs

Orange and lemon

vi) trees

neem and banyan

vii). Climbers

grapes and money plant

viii). Creepers

pumpkin and watermelon

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