1. Who classified the plants into different categories on the basis of photoperiodic responses
(A) benthem and Hooker
(B) cajlachjan
(C) Garner and Allard
(D) Linneus
Answer
Ans.(C)
2. The plant which needs light period shorter than critical period is called
(A) Short day plant(SDP)
(B) Long day plant(LDP)
(C) Day neutral plant(DNP)
(D) Short long day plant(SLDP)
Answer
Ans.(A)
3. Vernalization is also called as
(A) Spiringification
(B) Yarovization
(C) Chilling effect
(D) All of these
Answer
Ans.(D)
4. The harmone which stimulates the flowering in vernalized plant is
(A) Florigen
(B) Vernalin
(C) Cytokinin
(D) Gibberellin
Answer
Ans.(B)
5. Vernalization is
(A) Growth curve related to light
(B) Effect of photoperiods on plant growth
(C) Speeding up ability to flower by low temperature
(D) Diurnal photoperiodicty
Answer
Ans.(C)
6. Epigeal germination is found in
(A) Gram
(B) Pea
(C) Castor
(D) Jowar
Answer
Ans.(C)
7. Which of the following substance acts as natural germination inhibitor?
(A) Cytokinin
(B) Gibberellin
(C) Ethylene
(D) Caumarin
Answer
Ans.(D)
8. The part of seed which emerges out first during germination is
(A) Radicle
(B) Plumule
(C) Root
(D) Shoot
Answer
Ans.(A)
9. Indefinite growth of plants is due to presence of
(A) Meristemtic cells
(B) Parenchyma
(C) Permanent tissue
(D) Vascular tissue
Answer
Ans.(A)
10. In which of the following, rate of growth gradually slows down and comes to steady stage?
(A) Lag phase
(B) Log phase
(C) Exponential phase
(D) Stationary phase
Answer
Ans.(D)
11. Identify the true statement/statements regarding growth and development in organisms.
(A) Growth is intrinsic.
(B) Growth is the physical development while development is the physiological growth.
(C) Growth is accompanied by development.
(D) All of these.
Answer
Ans.(D)
12. Vernalization treatment can convert
(A) a biennial into an annual.
(B) a spring variety into a winter variety.
(C) an annual into a perennial.
(D) all of these .
Answer
Ans.(D)
13. Scarification is a method of overcoming dormancy in seeds which
(A) contain immature embryo.
(B) Hard seed coat.
(C) possess germination inhibiting substance.
(D) contain fully formed but physiologically unripe embryo.
Answer
Ans.(B)
14. Identify the precursor substance used in the biosynthesis of gibberellins in plants.
(A) Gibberellic acid
(B) Methionine
(C) Acetyl Co-A
(D) Tryptophan
Answer
Ans.(C)
15. Seeds in which germination is stimulated by light are called
(A) Photoblastic seeds
(B) Thermoblastic seed
(C) Positively photoblastic
(D) Negatively photoblastic
Answer
Ans.(C)
16. The chemical substances like phenolics, caumarins, ferulic acid are
(A) Growth harmones
(B) Growth inhibitors
(C) Germination inhibitors
(D) Germination promoters
Answer
Ans.(B)
17. The seeds which can not germinate in absence of light is called
(A) Positively photoblastic seed
(B) Negatively photpblastic seed
(C) Photoblastic seed
(D) Photpperiodic seeds
Answer
Ans.(A)
18. Germination inhibitors leached out by one plant may inhibit germination of seeds of other plants is called as
(A) Allopathy
(B) Allelopathy
(C) Dormancy
(D) Aromapathy
Answer
Ans.(B)
19. The dormancy of seed is due to mechanical resistance of seed coat in
(A) Allisma
(B) Capsella
(C) Amaranthus
(D) All the above
Answer
Ans.(D)
20. Which of the following growth harmones in plant is influenced by light?
(A) Gibberellin
(B) Cytokinin
(C) Auxin
(D) Ethylene
Answer
Ans.(C)
21. A seed which is just waiting for favourable environmental condition to germinate is called
(A)Dormant seed
(B)Quiescent seed
(C) Non-viable seed
(D) Dead seed
Answer
Ans.(B)
22. Richmond – Lang effect is
(A) Morphogenesis
(B) Delay of senescence under control of cytokinin
(C) Induction of early flowering
(D) Protection of organs
Answer
Ans.(B)
23. 2,4-D is used as
(A) Florigen
(B) Vernalin
(C) Herbicide
(D) Fungicide
Answer
Ans.(C)
24. The type of germination in which cotyledons come above the ground is called as
(A) Epigeal
(B) Hypogeal
(C) Viviparpus
(D) Oviparous
Answer
Ans.(A)
25. In most of monocot plants, germination is
(A) Epigeal
(B) Hypogeal
(C) Viviparous
(D) Hydrogeal
Answer
Ans.(B)
26.The phase of growth which is the first phase and represents lag phase of growth curve is
(A) Formative phase
(B) Cell enlargement phase
(C) Maturation phase
(D) Stationery phase
Answer
Ans.(A)
27. The lateral meristem in plant is reponsible for
(A) Primary growth
(B) Secondary growth
(C) Exponential growth
(D) Growht in elongation
Answer
Ans.(B)
28. Plant growth can be measured by
(A) Horizontal microscope
(B) Crescograph
(C) Auxanometer
(D) All the above
Answer
Ans.(D)
29.Auxins were first isolated form the plants by
(A) Darwin
(B) F.W.Wend
(C) Boysen-Jensen
(D) Sachs
Answer
Ans.(B)
30. Apical dominance is due to
(A)Abcisic acid
(B) Gibberelic acid
(C) Auxin
(D) Cytokinin
Answer
Ans.(C)
31. The term auxin was coined by
(A) Skoog
(B) Haberlandt
(C) Miescher
(D) F.W. Went
Answer
Ans.(D)
32. Precursor of Indole acetic acid (natural auxin) is
(A) Glycine
(B) Methionine
(C) Isopentynyl pyrophosphate
(D) Tryptophan
Answer
Ans.(D)
33. All the following hormones are growth inhibitors except
(A) Absiccic acid
(B) dormin
(C) ethylene
(D) IAA
Answer
Ans.(D)
34. Which of the following is a gaseous hormone
(A) IBA
(B) NAA
(C) Abscicic acid
(D) Ethylene
Answer
Ans.(D)
35. Which of the following bioassays are used to detect the presence of auxin
(A) Avena curvature test and tobacco pith culture
(B) Split pea stem curvature test and tobacco pith culture
(C) Avena curvature test and Split pea stem curvature test
(D) tobacco pith culture only
Answer
Ans.(C)
