​Give a reason why it is only mutation in genes of gametes that can influence evolution.

​A student  set up an experiment as shown in the diagrams below;

State three characteristics that ensure cross – pollination takes place in flowering plants.

​State two functions of cell sap.

(a) State the role of light  in the process of photosynthesis.

(b) ​Name one end product of dark reaction  in photosynthesis.