Please help if you have any idea about either of the questions!!
a) The leaves of plants growing in bright light were exposed to radioactive carbon dioxide for an hour. This contains radioactive carbon atoms. Several hours later the roots of the plant had become radioactive.
Describe fully, in sequence, the different processes that were responsible for the radioactivity getting from the air around the plants to its roots. (9 marks)
b) The same experiment was tried with an identical plant, but in dimmer light. No radioactivity reached this plant's roots. Suggest why this was the case. (2 marks)
