Question

Q.3 Answer the following questions. (Any Five) 15

i) a) Explain in brief - Lamarck’s principle of ‘use or disuse of organs’.

b) Give two examples.

c) What are ‘acquired characters’?

ii) a) Why some living organisms have to perform anaerobic respiration?

b) Give examples of such living organisms.

c) What are the two steps of anaerobic respiration?

iii) If frog population in paddy fields declines all of a sudden,

a) What will be the effect on paddy crop?

b) Number of which consumers will decline and which will increase?

c) Name the Indian states where paddy is cultivated on a large scale.

iv) a) What is clean technology ?

b) Why is it essential to ban plastic bags?​

Answer 1

There is no need of oxygen for respiration.

Amoeba, protists, etc.

Glycolysis and Fermentation.

If frog population declines it results in increase of grasshopper and the producer declines.

It must be in vicinity of coastal land.

It is very important to ban plastic to prevent land from land pollution.

Plastic also affects on feeding of animals.