Q18 of 43 Page 141

Uproot an onion plant and take a thin section of its root tip. Stain it and observe under the microscope. Draw as you see and identify the stages of the cell division. (AS3)

Onion root tip consists of meristematic tissues which consist of cells that are continuously dividing. Hence, by observing those cells we can see the various stages of mitosis.


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16

“All unicellular organisms undergo only mitotic cell division during favorable conditions” – Do you support this statement? Why? (AS2)

 17

Vicky’s father wants to grow a single plant having two desirable characters colourful flowers and big fruits. What method will you suggest him and why? (AS3)

 19

Visit a nearby village and collect information how farmers grow sugarcane, flowering plants like chrysanthemum, primrose and vegetables like stem tubers, plump gourd (dondakaya) etc. Make a report and present in class. (AS4)

 20

Collect information from the school library or using internet what vegetative methods are followed in your district as well as in your state to propagate various plants of economic importance. Represent it in a graph. (AS5)