"Give me a living cell of any plant and I will give you a thousand plants of the same type". Is this only a slogan or is it scientifically possible? Write you’re your comments and justify them.

Each plant or group of plants has some phylogenetic significance in relation to evolution. Cycas, one of the few living members of gymonsperms is called as the 'relic of past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement?

Solve it graphically Shruti and Swati each have certain number of pens. Shruti says to Swati, “If you give me 10 of your pens, I will have twice the number of pens left with you. Swati replies, ‘‘If you give me 10 of your pens, I will have the same number of pens as left with you. Find the number of pens with Shruti and Swati separately.

Which of the following lenses L_1 , L_2 and L_3 will you select as objective and eyepiece for constructing best possible (i) telescope and (ii) microscope? Give reason to support your answer.

Two dice, one blue and one grey are thrown at the same time. Write down all the possible outcomes. : A student argues that 'there are 11 possible outcomes 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Therefore, each of them has a probability 1/11 . Do you agree with his argument ? Justify you answer :

How will you induce lateral branching in a plant which normally does not produce them?Give reason in support of your answer.

Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.