Bacteria cannot be sern with the naked eyes, but these ran be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate die presence of microbes under a microscope, which sample would you carry and why?

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.

Long Answer Questions Five mark QUESTIONS FROM CBSE BOARD EXAMINATIONS : (a) Asa senior biology student, you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.

Under which of the following conditions are you most likely to fall sick ? (i) when you are taking examinations, (ii)when you have travelled by bus and train for two days, (iii) when your friend is suffering from measles. Why ?