When you drop a ball, it is dropped DOWNWARDS so the number is represented by a negative number. If you toss the ball up it will be a positive number.
To answer your question:
When an object is dropped downwards there will be a negative number since the object is falling downwards.
I think it is NAD, this ensures that the NAD can go back to glycolysis where it can again be reduced and go back through anaerobic respiration.
The answer is cotton. It is natural because it is grown and easily woven in to clothes :)
C.) depend on the same resources
Competition is the rivalry between living things for territory, resources, goods, mates, etc. It is a symbiotic relationship that occurs in nature. Same or different members of species compete for resources, especially for limited natural resources.
B) This is false, because enzymes do the complete opposite.
