ah! All thanks to the cell membrane!
The cell membrane contains phospholipids that are amphiphilic (polar - water attracting and non-polar - water repelling) in nature. That's why the cell membrane allows non-polar materials to pass through but not polar materials. (if you're learning junior science you really don't need to know this!) The polar materials require proteins found on the cell membrane called protein channels or carrier proteins to pass through. (their names are pretty self-explanatory!)
All the best!
I learned this it the nuclear without that they would not have nutrients
Answer:
I am pretty sure the answer is c.
There are no scenarios here to chose from so I can give an example.
When a natural gas is burned heat is realised which causes the molecules to move faster creating a thermal energy out of a chemical energy.
Answer:
continuous flow of energy and cyclic flow of matter in nature
