Either, carbon, hydrogen, nitrogen, oxygen, phosphorus, or sulfur. I would go with carbon because of the photosynthesis and cellular respiration<span />
The two substances needed in this situation are:
potato extract and catechol<span />
Answer:
Pressure is simply the force experienced by an object divided by the area of the surface on which the force acts. Note that the force here is the force acting perpendicular to the surface. The unit for pressure is the pascal, Pa.
Explanation:
Answer:
I am pretty sure it is A or D sorry if this does not help