Which of the following organ/s of the plant show/s negative geotropism?
a) root
b) stem
c) root hairs
d) both a and c
Explanation: it is away from the force of gravity
The tropic movement of curvature induced in plants organs in response to the unilateral effect of light is called……
a) positive taxis
b) klinokinesis
c) geotropism
d) phototropism
Which of the following organ/s of the plant show/s positive phototropism?
a) root
b) young stems
c) root hairs
d) both a and c
Explanation: the curvature is due to the greater growth on the shaded side on which the light acts.
Which of the following organ/s of the plant is/are usually indifferent to stimulus of light?
a) roots
b) stem
c) flower
d) both a and c
Explanation: roots orientation being determined chiefly by the gravity
Innate behavior is all except……..
a) coded in DNA
b) modified in individual’s life span
c) modified with species evolution
d) programmed responses to external stimulus
Orthokinesis and klinokinesis are concerned with……..
a) orientation behavior
b) habituation
c) tropic movements
d) learning
