Chloroplasts, containing chlorophyll which absorb light for photosynthesis

A tap root is one large root, like a carrots, parsnips. Fibrous roots are small and a plant has lots of them eg, an onion has lots of tiny fibrous roots; grass plants also have fibrous roots.  Both types have the same function - to absorb water from the soil.

A result is 'what happened' and could be your observations or measurements. The conclusion is 'what you have found out' from doing the experiment.