<span>Bonding Properties i think </span>
the main job of the digestive system is to turn the food you eat into the nutrients and energy. the nutrients and energy made from the food u eat helps you to survive. your body also uses these nutrients for growth and repair
I would say teh cytoplasm and nucleus.
Growing willow for biofuel is sustainable development because it is a source of fuel which potentially will never run out. For every willow tree that is cut down, another can be planted in its place. This means that the source of fuel is potentially limitless and subsequently sustainable.