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1
Chemotropism is seen inside the __________________.
Style
Ovary
Ovule
All of these.
2
Name the plant hormones responsible for the elongation of cells.
Gibberellins
Cytokinins
Abscisic Acid
Auxins
3
Some plants like pea, pumpkin and cucumber plant climb up on other plants or fences by means of __________________, which are sensitive to touch.
Leaves
Roots
Tendrils
4
The movement of an organism in the direction of a stimulus or away from it is called _________________.
Tropic movement
Tropism
Both (a) and (b) are correct.
None of these.
5
Photonasty is a type of nastic movement in response to
Water
Light
Touch
Smell
6
Where does auxin hormone synthesize in plants ?
Apical meristem of the root tip.
Apical meristem of the shoot tips.
7
A potted plant is kept in a card board box with a small slit of sun light exhibits __________________
Phototropic movement
Geotropic movement
Both (a) and( b)
Chemotropism
8
Most plant responses are controlled by ____________________
Nerves
Hormones
Muscles
All of these
9
Thigmonasty a type of nastic movement occur in response to which stimulus ?
Gravity
10
Name the plant hormones responsible for the promotion of cell division
abscisic acid
ethylene
gibberellins
cytokinins
11
Growth movements are also called as
Nastic movements
Turgor movements
Autonomic movements
12
Which of the following organisms does not have both muscles and skeleton for movement ?
Dog
Snail
Earthworm
Human being
13
The change in the direction of growth of root in response to the contact with the rock is an example of which type of tropic movement ?
Negative Phototropism
Positive Thigmotropism
Negative Thigmotropism
Positive Geotropism
14
How does thigmonasty movement differ from thigmotropic movement ?
Thigmonasty and thigmotropism are both same
Thigmotropism is in response to touch whereas thigmonasty is in response to the light
Thigmotropism is in response to the gravity whereas thigmonasty is in response to the light
Thigmotropism is a nastic movement whereas thigmotropism is a tropic movement
15
Apical dominance means _________________
Supperession of growth of apical buds due to presence of axillary buds.
Supperession of growth of axillary buds due to presence of apical bud.
Stimulation of apical bud growth by removal of axillary buds
inhibition of growth of axillary buds by removal of apical bud.