On the earth, down means toward the earth's center.
Answer:
Membrane markers allow cells to recognize one another, which is vital for cellular signaling processes that influence tissue and organ formation during early development. This marking function also plays a later role in the “self”-versus-“non-self” distinction of the immune response.
Explanation:
This is false. Because the conversion of ATP to ADP is just part of the cycle that continues to ADP to ATP. It's a cycle because when an ATP molecule looses a Phosphate a little spark of energy is released which helps different parts of the cell. Hope this helps!
Answer:
C. The cork in bulletin boards
Explanation:
Cork is made primarily from a plant called Quercus suber (the cork oak).