GROWTH & PLANT MOVEMENT
1. Apples are wrapped in waxed paper to
a) Prevent sunlight from changing the colour b) Prevent aerobic respiration
c) Make the apple look costly d) Prevent Ethylene formation that hastens ripening e) None of these
2. A plant hormon that influences sex of flowers in cucurbita
a) GA3 b) IAA c) ABA d) IPA e) Ethylene
3. Richmond long effect is shown by
a) Auxins b) Kinetin c) Gibberlling d) Suger e) Ethylene
4. The paratonic movement due to electric current
a) Aniemotaxis b) Thigmnotaxis c) Galvanotaxis d) Rheotaxis e) None of these
5. Anthesin is
a) Flowering of plant b)Synthetic hormone c) Hormone essential for flowerinng d) All of these
e) None of these
6. Optimum temperature range for plant growth
a) 5-150C b) 20-350C c) 28-300C d) 15-300C e) 10-280C
7. Kinetin is a) Indol Butyric acid b) Indol acetic acid
c) 6- furfuryl amino purine d) Butyric acid e) None of these
8. The enzyme causes softening of fruit wall
a) Protease b) Cellulose c) Amylase d) Nuclease e) Lipase
9. Seedless fruits can be obtained by spraying
a) GA b) IAA c) Florigen d) Anthesin e) Vernalin
10. Healing of injurry in plants is due to the secretion of
a) ABA b)GA c) Traumatic acid d) Folic acid e) None of these
11. Xerochassy is
a) Tropic movement b) Nastic movement c) Tactic movement
d) Hygroscopic movement e) None of these
12. Programmed cell death is
a) Apoptosis b) Apomixis c) Apolysis d) Amphimixis e) Abscission
13. The commercial source of Ethylene
a) Aspirin b) Vinegar c) Ethephone d) All of these e) None of these
14. The principal natural Auxin in plants
a) IBA b) IAA c) IPA d) NAA e) 2,4-D
15. The pollen movement towards micropyle,
a) Thigmotropic b) Chemotaxis c) Chemotropic d) Phototropic e) None of these
16. Size of fruits can be increased by
a) Defolation b) Hormone application c) Detopping d) Prooning e) All of these
17. Plants growing in shades are taller
a) It is due to low Auxin formation b) It is due to high concentration of Auxin
c) It is due to low concentration of kinetin d) It is due to phototropism e) None of these
18. Double sigmoid curve is found in the growth of
a) Fruits b) Flowers c) Inflorescence d) Leaves e) Bud
19. A green plant turn yellow due if placed in darkness. This is called
a) Phototropism b) Dormany c) Chlorosis d) Etiolation e) Mosaicism
20. The movement due to the response of air current
a) Anemotaxis b) Thermotaxis c) Phototaxis d) Galvanotaxis e) Rheotaxis
21. Linear growth can be measured by
a) Auxanometer b) Galvanometer c) Axanometer d) None of these e) All of these