There is more then 2 groups of minerals
A scientific law should have no exceptions otherwise the law has failed
While adding we need to follow that the units of mass i.e., kilogram and gram are converted into grams before addition and then follow the simple addition process. We can add two or more units of mass given in kilogram and grams like ordinary numbers. Always express grams as 3-digit numbers for example 3 g = 003 g.
Answer:
B)Cyclins regulate the timing of cell cycle
