Acc to my book,there is geotropism which has been replaced by gravitropism in your M.C.Q's.
So my question is what is positive and negative tropism?

Asked by arymahajan24 | 7th Aug, 2016, 08:27: PM

Expert Answer:

Gravitropism is another terms used for geotropism.

Positive gravitropism/geotropism – The growth of plants towards the gravity that is the growth of roots.

Negative gravitropism/geotropism – the growth of the plants against the gravity.

Answered by Hemangi Binny | 8th Aug, 2016, 11:41: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.