Plant Growth and Development

Q1. Klinostat is employed in the study of:

1. Osmosis.
2. Growth movements.
3. Photosynthsis.
4. Respiration.

Q2. ABA acts antagonistic to:

1. Ethylene.
2. Cytokinin.
3. Gibberlic acid.
4. IAA.

Q3. What reason will you assign for coconut milk used in tissue culture?

1. Gibberellins.
2. Cytokinins.
3. Auxins.
4. Ethylene.

Q4. Which growth hormone accerlates the malting process in brewing industry?

1. Auxins.
2. Gibberellins.
3. Ethylene.
4. Cytokinins.

Q5. Which one of the following is a long day plant?

1. Wheat.
2. Soyabean.
3. Bajra.
4. Tobacco.

Q6. Phototropic and geotropic movements are linked to:

1. Gibberellins.
2. Enzymes.
3. Auxins.
4. Cytokinins.

Q7. The hormone responsible for apical dominance is:

1. IAA
2. GA
3. ABA
4. Florigen.

Q8. The response of different organisms to environmental rhythms of light and darkness is called:

1. Phototaxis.
2. Photoperiodism.
3. Phototropism.
4. Vernalization.

Q9. Which of the following movement is not related to auxin level?

1. Bending of shoot towards light.
2. Movement of root towards soil.
3. Nyctinastic leaf movements.
4. Movement of sunflower head tracking the sun.

Q10. Primary precursor of IAA is:

1. Phenylalanine.
2. Tryptophan.
3. Tyrosine.
4. Leucine.

Q11. Which of the following hormones can replace vernalization?

1. Auxin.
2. Cytokinin.
3. Gibberellins.
4. Ethylene.

Q12. Which of the following hormones hasten the ripening of fruits?

1. Gibberellins.
2. Cytokinins.
3. Ethylene.
4. Abscisic Acid.

Q13. Which plant growth regulator is the derivative of carotenoids?

1. Auxin.
2. Gibberelic acid.
3. Cytokinin.
4. Abscisic acid.

Q14. Anthesis is a phenomenon which refers to:

1. Reception of pollen by stigma.
2. Formation of pollen.
3. Development of anther.
4. Opening of flower bud.

Q15. Liver and pancreas arise from.

1. Foregut.
2. Midgut.
3. Hindgut.
4. None of these.

Q16. In horticulture certain plants are trimmed periodically to get denser foliage. This practice utilizes the knowledge
of which facet of plant growth?

1. Dedifferentiation.
2. Apical Dominance.
3. Abscission.
4. Senescence.

Q17. The photoperiod in plants is perceived at:

1. Meristem.
2. Flower.
3. Floral buds.
4. Leaves.

Q18. Which one among the following chemicals is used for causing defoliation of forest trees?

1. Malic hydrazide.
2. Phosphon-D.
3. 2, 4-dichlorophenoxy acetic acid.
4. None of these.

Q19. In a bundle of green coriander leaves, you will find leaves of different shapes. What does this show?

1. Plasticity.
2. Heterophylly.
3. Homophylly.
4. Ornamentation.

Q20. Mowing grass lawn facilitates better maintenance because.

1. Wounding stimulates regeneration.
2. Removal of apical dominance and stimulation of intercalary meristem.
3. Removal of apical dominance.
4. Removal of apical dominance and promotion of lateral meristem.

Q21. Tendrils exhibit/twining of tendrils is due to:

1. Thigmotropism.
2. Seismonasty.
3. Heliotropism.
4. Diageotropism.

Q22. The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded,
is:

1. Vernalization.
2. Stratification.
3. Denudation.
4. Scarification.

Q23. Coconut water contains:

1. ABA.
2. Auxin.
3. Cytokinin.
4. Gibberellin.

Q24. Exponential growth of the plants is express as W = W e r represents.

1. Ability of the plant to produce new cells.
2. Efficiency index.
3. Relative growth rate.
4. All of the above.

Q25. The stage of rapid cell division just after fertilization is:

1. Organogenesis.
2. Cleavage.
3. Gastrulation.
4. Growth.

Q26. Dwarfness can be controlled by treating the plant with.

1. Cytokinin.
2. Gibberellic acid.
3. Auxin.
4. Antigibberellin.

Q27. Which one is incorrect?

1. Epiblast is presumptive ectoderm and mesoderm.
2. Hypoblast is presumptive endoderm.
3. Hypoblast is presumptive mesoderm.
4. Upper layer of cells in blastoderm is epiblast.

Q28. Leaves of many grasses are capable of folding and unfolding because they.

1. Are very thin.
2. Are isobilateral.
3. Have specialized bulliform cells.
4. Have parallel vascular bundles.

Q29. Mobilisation of stored food in germinating seeds is triggered by:

1. Auxins.
2. Cytokinins.
3. Gibberellins.
4. Ethylene.

Q30. The conditions necessary for vernalization are.

1. Water and carbon dioxide.
2. Oxygen and water.
3. Low temperature and oxygen.
4. High temperature and water.