Are used to make corn and wheat grow taller a auxins b gibbereilins c cytokinins

The answer is; B

This hormone cases growth at internodes. Elongation at these points causes the plant to grow taller because of the long spaces between the stem nodes. The hormones are produced at meristems of apical buds and roots of plants. It is named after a fungus that infects plants causing them to grow too tall and fall over.

Auxins promote apical growth while cytokinins delay senescence in plants.  

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus