Class 6 Science-Workbook Chapter 7 Getting to know Plants

 Class VI

Chapter 7

Getting to know Plants

I. Answer the following questions in brief:

Q.1. What is petiole? Do all leaves have petioles?

Ans. The part of a leaf by which it is attached to the stem is called petiole. No all leaves do not have petioles. In some plants, leaves are attached directly to the plant stem.

Q.2. Where will you locate midrib in a leaf?

Ans. A midrib is commonly find at the back part of a leaf.

Q.3. If a plant has leaves with parallel venation what kind of roots will it have?

Ans. A plant has leaves with parallel venation will have fibrous roots.

Q.4. Name two climbers and two creepers.

Ans - Climbers : (a) Money Plant, (b) Green Peas

Creepers : (a) Pumpkin  (b) Water-Melon

Q.5. Which part of the plant helps it to stand upright?

Ans -The stem is the part of plant helps it to stand upright.

Q.6. What are lateral roots?

Ans -The smaller roots that grow on the main tap root are called lateral roots.

Q.7. Name the lowermost part of the pistil.

Ans - Ovary is the lowermost part of the pistil.

Q.8. Why are stems called 'two-way streets'?

Ans - Stems are called 'two-way streets' because water and minerals are transferred from the stem to the leaves in upward direction for photosynthesis at the same time food is transferred to other parts of the plant in downward direction.

Q.9. A potato has starch. Does it prepare starch itself? If not, where does this starch come from?

Ans - Potatoes do not make starch on their own. Starch is produced by the leaves and transported to the potatoes.

(H.w.) Q.10. Draw a diagram showing the inner structure of an ovary. Draw both longitudinal and transverse sections.

Ans -

II. Give one term for each of the following:

(a) The innermost part of flower  - Pistil

(b) Venation shown by leaves of plants heaving tap roots. Reticulate Venation

(c) Network of lines of a leaf. Veins

(d) Unwanted plants that grow themselves in a field. Weeds

(e) Plants that cannot stand upright and spread on the ground. -  Creepers

(f) Process of preparation of food by plants in the presence of sunlight. -  Photosynthesis 

III. Fill in the blanks:

(a) Roots anchor the plant to soil.

(b) Plants having fibrous roots have Parallel venation in them.

(c) Climbers take support of neighboring structures to stand upright.

(d) The topmost part of a stamen is called Anther.

(e) Stems transport water and minerals from roots to leaves though narrow tube(xylem) inside them.

(f) Water comes out of leaves in the form of vapour during the process of transpiration.

IV. State whether True or False

(a) Roots hold the plant upright. False

(b) Every flower has both stamens and pistil. False

(c) Number of petals in a flower is generally much more than the number of sepals. True

(d) All leaves have petioles in them. False

(e) Leaves make food which gets stored in potatoes in potato plants. True

(f) Carrot and radish that we eat are roots. True

(H.w.) V. Match the following:

Ans

VI. Select the correct alternative:

(i) Lateral roots are branches of

Ans (a) Tap roots

(ii) Which of the following parts of a plant in called a 'two-way street"?

Ans (d) Stem

(iii) Carrot, radish, turnip and tapioca are examples of 

Ans (b) Roots

(iv) Which of these is creeper?

Ans (b) Pumpkin

(v) Anther is a part of 

Ans (a) Stamen

(vi) Look at the Figures given below and state which of the following statements is true.

Ans (b) Leaves of plant in fig (a) have reticulate venation while those in fig (b) have parallel venation.

(H.w.) VII. Complete the following word puzzle with the help of the clues given below: