Getting to Know Plants | Science 6th | Chapter 7 | Questions and Answers

JANDKNCERT | Science 6^th |

Getting to Know Plants | Science 6th | Chapter 7 | Questions and Answers

 

Chapter 7: Getting to Know Plants

 

Introduction

In Chapter 6, we learnt about the Changes Around Us in which we learnt that many changes are taking place around us on their own. We learnt about physical and chemical changes, microbes are responsible for the decaying of organic matter. Some changes are reversible and some are irreversible.

This chapter is about Getting to Know Plants. The following points will help you to understand this chapter easily.

•     The stem bears leaves, flowers and fruits.

•     A leaf usually has a petiole and a lamina.

•     The pattern of veins on the leaf is called venation. It can be reticulate or parallel.

•     Leaves give out water vapour through the process of transpiration.

•     Green leaves make their food by the process of photosynthesis using carbon dioxide and water in the presence of sunlight.

•     Roots absorb water and minerals from the soil and anchor the plant firmly in the soil.

•     Roots are mainly of two types: tap root and fibrous roots.

•     Plants having leaves with reticulate venation have tap roots while plants having leaves with parallel venation have fibrous roots.

•     The stem conducts water from roots to the leaves (and other parts) and food from leaves to other parts of the plant.

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

 

Let us try to answer some questions taken from the NCERT Book of Science Class 6th. This Exercise is taken from the same book.

 

Exercises

Q1. Correct the following statements and rewrite them in your notebook.

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

(b) Leaves hold the plant upright.

(c) Roots conduct water to the leaves.

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

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

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

 

Answer.

(a) Roots absorb water from and minerals from the soil.

(b) Roots hold the plant upright.

(c) Stems conduct water from roots to the leaves.

(d) The number of petals and sepals in a flower is always different.

(e) If the sepals of a flower are joined together, its petals may or may not be joined together.

(f) If the petals of a flower are joined together, then the pistil may or may not be joined to the sepal.

 

Q2. Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 7.3.

 

 

Q3. 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 would you classify it?

 

Answer.

In the yard outside of my house, there is a plant that has climbed to the wall of my house. This plant has a long but weak stem. It is a climber.

 

Q4. What is the function of a stem in a plant?

 

Answer.

The stem conducts water and minerals from roots to the leaves and other parts of the plant and food from leaves to other parts of the plant.

 

Q5. Which of the following leaves have reticulate venation?

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

 

Answer.

Tulsi, coriander, and china rose plants have reticulate venation, while wheat, maize and grass have parallel venation.

 

Q6. If a plant has fibrous roots, what type of venation, do its leaves likely to have?

 

Answer.

If a plant has fibrous roots then its leaves have parallel venation, because plants with fibrous roots always have parallel venation in leaves.

 

Q7. If a plant has leaves with reticulate venation, what kind of roots will it have?

 

Answer.

If leaves of a plant have reticulate venation then it has taproot type of roots.

 

Q8. Is it possible for you to recognize the leaves without seeing them? How?

 

Answer.

Yes, it is possible to recognise leaves without seeing them. We can use our sense of touch to recognise the leaves of a plant. We can also recognise the leaves of a plant by feeling its roots. Leaves, having parallel venation, have no main root while those of reticulate type leaves have the main root.

 

Q9. Write the names of the parts of a flower.

 

Answer.

A flower has sepal, petal, pistil, and stamen parts.

 

Q10. Which of the following plants have you seen? Of those that you have seen, which one have flowers?

Grass, maize, wheat, chilli, tomato, tulsi, pipal, shisham, banyan, mango, Jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut

 

Answer.

I have seen grass, maize, wheat, chilli, and tomato plants. Of these only chilli and tomatoes have flowers.

 

Q11. Name the part of the plant which produces its food. Name this process.

 

Answer.

The leaves of a plant produce its food. This process is known as photosynthesis.

 

Q12. In which part of a flower, you are likely to find the ovary?

 

Answer.

The ovary is found in the pistil part of the flower.

 

Q13. Name two flowers, each with joined and separated sepals.

 

Answer.

Cotton and Datura are the flowers with joined sepals and lotus and lily flowers have separated sepals.

 

Q14. Answer in brief:

a. Give the technical names of I. Baby root, II. Baby shoot.

 

Answer.

I. Baby root is technically called as, radical.

II. Baby shoot is technically called as, plumule.

 

b. Name two roots modified for storage of food.

 

Answer.

Carrot and radish are modified roots for the storage of food.

 

c. Sweet potato is _________ and potato is a ______.

 

Answer.

Sweet potato is root and potato is a stem.

 

d. What is a hermaphrodite flower?

 

Answer.

A flower that consists of both male as well female parts to reproduce is known as a hermaphrodite flower.

 

Q15. Multiple-choice Questions:

 

a. Which of the following has a taproot?

i. Maize

ii. Wheat

iii. Pea

iv. Rice

 

Answer. iii. Pea

 

b. Which of the following is a modified stem?

i. Radish

ii. Onion

iii. Sweet potato

iv. Maize

 

Answer. ii. Onion

 

c. Pollen grains are produced in

i. Flowers

ii. Ovary

iii. Anther

iv. fruit

 

Answer. iii. Anther

 Your search ends here.....