Carefully observed the following figure

(a) Name the technique shown in the figure and the scientist who demonstrated this technique for the first time.
(b) Name atleast three plants for which this technique can be employed for their commercial production.
(c) What is the significance of aerating tube and feeding funnel in this setup ?

Name three plants for which hydroponics can be employed for their commercial production

Consider the figure of a defective crystal : (a) Name the defect shown by this diagram. (b) What is the effect of this defect on the solid ? (c) Name as ionic compound which can show this type of defect.

Observe the figures given below and then answer the questions that follow : (i) What is the picture depicting ? (ii) What was the reason that the giraffe stretched their neck and forelimbs ? (iii) Name the theory to which this picture belongs. (iv) Who explained this theory? (V) What is the conclusion of this theory?

Carefully observe the figure and then answer the questions that follow : (i) Identify the ancestors of humans shown in the figure. (ii) Write any two characters of each A and C. (iii) What is the cranial capacity of B ? (iv) What is the height of D ? (v) What type of teeth does D had ?

Study the figure given aside & answer the questions that follow : Identify the gas Y. What property of gas Y does this experiment demonstrate. Name another gas which has the same property &can be demonstrated through this experiment.

Refer the figures A , B , C and D given below. Which of the following option shows the correct name of the animals shown by the figures A , B, C and D ?

Observe the set of 4 figures A, B, C and D and answer the following questions. I. Which one of the figures shows mutualism? II. What kind of association is shown in D? III. Name the organisms and the association in C. IV. What role is the insect performing in B?

Look at the figures A, B and C carefully and answer the questions which follow: Describe step by step what is happening in the three figures. What is the advantage of this activity to our body?

Read the following statements and choose the correct one from the options given below. (i) Hydroponics is the practice of growing plants in nutrient - enriched water , without soil. (ii) Hydroponics has been successfully employed as a technique for the commercial production of vegetables such as tomato. (iii) Hydroponics methods require purified water and non - mineral nutrient salts. (iv) The nutrient solutions should not be aerated to obtain optimum growth. (a) (i) and (ii) only (b) (i) and (ii) only (c) (i) , (iii) and (iv) only (d) (i) , (ii) , (iii) and (iv)

A ray of light XY passes through a right angled isosceles prism as shown alongside Figure. (a) What is the angle through which the incident ray deviates and emerges out of the prism? 9b) Name the instrument where this action of prism is put into use. (c) Which prism surface will behave as a mirror ?