Chapter 1 A & B
A) SENSITIVITY AND RESPONSE IN PLANTS
B) RESPONSE AND CHEMICAL COORDINATION IN PLANTS - HORMONES
Multiple Choice Questions:
1.Who discovered the sensitivity of plant?
a) Pavlov b) J C Bose c) Darwin d) Went
2. Tactic movement seen in
a) Tulip flower b) Apex of a plant shoot c) Sunflower d) Volvox
3. Stimulus is
a) A physical force b) Energy c) Changed environment d) None of these
4. Stem are always
a) Geotropic b) Phototropic c) Hydrotropic d) Chemotropic
5. Auxin secreted from
a) Brain b) Bark c) Meristematic tissue d) Vascular bundle
6. Movement of whole plant in response to external stimulu is called
a) Tropic movement b) Tactic movement c) Nastic movement d) Hydrotropism
7) Chemonastic movement is found in
a) Drosera b) Sunflower c)Oxalis d) Mimosa
8) which type of movement found in tulip?
a) Seismonastic b) Hydrotropic c) Thermnostic d) Photonastic
9) which is the natural auxin?
a) 2,4-D b) NAA c) IAA d) IBA
10) Seed germination is induced by which hormone ?
a) Gibberellic Acid b) Auxin c) Cytokinin. d) ABA
11) Which hormone delay leaf senescence?
a) Auxin b)Gibberelin c) Cytokinin d) IAA
12) which is the synthetic hormone?
a) IBA b) ABA c) Auxin d) Cytokinin
13) A plant hormone related with inhibition of senescence is
a) Ethylene b) ABA c) Bromic Acid d) Gibberelin
14) Apical dominance phenomenon is caused by
a) Auxin b) Gibberelin c) Cytokinin d) Abscisic acid
15) Auxin are abundantly produced in
a) Base of the root b) Base of the shoot c) Shoot d) Meristematic region of shoot
16) A higher concentration of Ethylene is found in
a) Green banana b) Ripe banana c) Fresh potato Tuber d) Green apple
17) Common Gibberelin is
a) GA1 b) GA2 c) GA3 d) GA4
18) Stems are
a) Positively geotropic and negatively phototropic b) Positively geotropic and positively phototropic c) Negatively geotropic and positively phototropic d) Negatively phototropic and negatively geotropic
19) In tropic movements, plant parts move
a) Away from the stimulus b) Towards the stimulus c) Either towards or away from the stimulus d) Only towards water
20) Which of the following hormones regulate stomatal closer?
a) Auxin b) Gibberelin c) Abscisic acid d) Cytokinin
