One of the most difficult solar energy design problems to solve is: how to collect the sunlight how to transform sunlight into heat storing the heat energy difficulty in using the energy

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey

its the cell wall and the they are unique to plant

multiply it by 5 in order for you to understand i cant give an exact answer.