What is common in a rubber ball, a football and a glass marble?
They are made of same material.
They are of same size.
No common thing.
They are of same shape.
All the objects mentioned are round in shape.
All living organisms are linked to one another because
(a) they have the common genetic material of the same type
(b) they share common genetic material but to varying degrees
(c) all have a common cellular organization
(d) All of the above
2 balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. Will the balls start rolling? If so, in which direction? Will they move with the same speed? Give reasons for your answer?