Who first suggested presence of growth regulatory chemicals in plants ?

The existence of growth regulating chemicals in plants was first suggested by

Growth regulator_____ inhibits plant growth

Who first suggested the conservative model of DNA replication?

Growth in plants is

Growth in plants is

Growth in plants is

A farmer is interested to cultivate cucumber plants in his field. Then suggest him the correct plant growth regulator which can induce more number of female flowers in those plants?

The growth in plants is