Plant Cell

This time, in the lab, we observed onion cells under the microscope.The onion had to be stained with iodine as it is colourless, which, placed in simple english, cannot be seen. 

Onion peel



Iodine stained onion peel


Onion cell under microscope





Question:Why is there no chlorophyll in a onion cell?
Answer: The bulb of the onion is below ground where there is no sunlight, therefore it would be pointless for the bulb to contain chlorophyll. The leaves of the onion plant do in fact have chlorophyll.

Photos credits to my friend, Zhai Zihan.