Diff between phototropisim chemotropisim - Biology - Absorption by Roots

Question

Diff between phototropisim chemotropisim

Deepika Sharma · Accepted Answer

Dear Student

Types of tropisms
Phototropism
The growth movement in plants in response to light stimulus is
known as phototropism For example, the flower head
of a sunflower is positively phototropic as it moves from East to
West, along with the movement of the Sun
In the above activity, the shoots show positive
phototropism while the roots show
negative phototropism
The ovary stalk of groundnut is positively phototropic before
fertilization and becomes negatively phototropic after
fertilization This is the reason why fruits such as groundnuts are
formed underground
Chemotropism
The growth movement in plants in response to chemical stimuli is
known as chemotropism For example, the growth of
pollen tube towards the ovule in the ovary (through the stigma and
style) is an example of positive chemotropism
Regards