Q447
Which of the following control the root initiation, cell elongation and apical dominance?
A.
Auxin
AnswerB.
ABA
C.
Gibberellins
D.
Ethylene
Answer: Option A
Solution
Answer: Option A
Solution:
Auxin and cytokinin are the phytohormones that control root initiation, cell elongation and apical dominance.Auxins play a cardinal role in the coordination of many growths and behavioral processes in plant life cycles and are essential for plant body development. The Dutch biologist Frits Warmolt Went described the role of auxins in plant growth for the first time in 1920.