Many plant hormones show opposite effects. For example, the hormone present in the meristematic tissues of the shoots inhibits branching, whereas this effect is nullified by the hormones produced by roots. Which are these two hormones respectively?
A.auxins & cytokinins
B.Ethylene & abscisic acid
C.cytokinins & auxins

Question

Many plant hormones show opposite effects. For example, the hormone present in the meristematic tissues of the shoots inhibits branching, whereas this effect is nullified by the hormones produced by roots. Which are these two hormones respectively? 
A.auxins & cytokinins 
B.Ethylene & abscisic acid  
C.cytokinins & auxins

anonymous · Answer

go through this u will get an idea http://en.wikipedia.org/wiki/Apical_dominance

alexanderphantomhive · Answer

It is A.