Response to stimuli does not require a nervous system or a brain. Single
celled organisms respond to stimuli.

Even inorganic substances can respond to stimuli.
Ice melts when you apply heat!!
As if that's not enough, liquid water will even boil when enough heat is
applied!!

"Brian" wrote in message
...
Plants can, and do, respond to stimuli. However this is only an indication
that they are alive and in no way suggests the presence of a brain in the
way that we understand.
Only intentionally silly questions are deemed silly.
Best Wishes Brian
"Ch. Rajinder Nijjhar Jatt" wrote in
message
news:CUxgc.11$mv.3@newsfe1-win...
Hi,

It may seem a silly question but I have heard that the plants have
"lesser brain", the seat of instincts.

Is it true?

Rajinder