Q35 of 53 Page 1

Name two animals which show reproduction by regeneration method, which one of these also reproduces by budding method?

The two animals which shows reproduction by regeneration are: Planaria and Hydra


Hydra also reproduces using the budding method.


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How will you test in the laboratory, whether the given sample of water is hard or soft?

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Which out of the two spherical mirrors, has positive focal length? Which out of the two, will form a real and inverted image, at its ‘F’ point which can be taken on the screen.

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(a) one –half of a convex lens is covered with a black paper. Will such a lens produce an image of the complete object? Support your answer with a ray diagram.

(b) An object 5 cm high is held 25 cm away from a converging lens of focal length 10 cm.


(i) Draw the ray diagram and


(ii) Calculate the position and size of the image formed.


(iii) What is the nature of the image?