Place a fist full of Bengal gram (or any other seeds) in a bowl of water. Do you find some seeds float while others sink? Why do some seeds float and others sink? Which seeds do you think will germinate and why? Which seeds do you think will not germinate and why? Which seeds do you think farmers should use for sowing in the field?

Yes, when a fist full of Bengal gram (or any other seeds) are placed in a bowl of water, some will float and some will sink. The seeds which absorb the water will sink and seeds which will not absorb water will float. The seeds which sink at the bottom are healthy seeds. Unhealthy (damaged) seeds will float on the top of the water as they become hollow and lighter than the healthy ones. Germination is the process by which a plant grows from a seed. The seeds which sink at the bottom will germinate because they are of good quality. Good quality seeds are clean and healthy seeds that are free from infections and diseases. They are not damaged by microbes. So, healthy seeds will give a good yield and healthy crops. The seeds which float on the surface of the water will not germinate as they are damaged due to the attack of insects or microbes like bacteria, fungi, etc. The process of scattering seeds (or putting seeds) in the ground soil for growing the plants (or crops) is called sowing. The seeds which sink at the bottom and not float on the water should be used for sowing in the field as they are healthy seeds and can germinate.

E M B I B E

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 9

HARD

8th Telangana Board

IMPORTANT

Earn 100

Why do farmers plough their field during summer?

Important Questions on Production of Food from Plants

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 10

Rajendar cultivated cotton crop in his field. He did not get sufficient yield. Can you guess the reasons?

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 11

Place a fist full of Bengal gram (or any other seeds) in a bowl of water. Do you find some seeds float while others sink?

Why do some seeds float and others sink?
Which seeds do you think will germinate and why?
Which seeds do you think will not germinate and why?
Which seeds do you think farmers should use for sowing in the field?

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 12

I am a plant. I grow in crop fields. Farmers pluck me. I do not know the reason. Can you tell who am I?

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 14

Write a flow chart from ploughing to yielding in paddy.

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 15

How do you appreciate the irrigation systems used in the drought-prone areas?

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 16

Narendra sprayed overdose of pesticides on his cotton crop. Ramesh says it is a hazard to biodiversity and crop yield. Can you support Ramesh? How?

MEDIUM

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 17

Venkatesh observed the irrigation method for paddy fields. He wanted to follow the same practice for his Maize crop. What suggestions do you give him?

EASY

8th Telangana Board

IMPORTANT

Biology Class 8>Chapter 8 - Production of Food from Plants>Improve your learning>Q 19

What is the relation between night duration and crop field?