Plant Growth Questions: Paper - 03

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Plant Growth Questions: Paper - 03


Sr. No.



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: (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: (A)
3. Vernalization is also called as
(A) Spiringification
(B) Yarovization
(C) Chilling effect
(D) All of these
Answer: (D)
4. The harmone which stimulates the flowering in vernalized plant is
(A) Florigen
(B) Vernalin
(C) Cytokinin
(D) Gibberellin
Answer: (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: (C)
6. Epigeal germination is found in
(A) Gram
(B) Pea
(C) Castor
(D) Jowar
Answer: (C)
7. Which of the following substance acts as natural germination inhibitor?
(A) Cytokinin
(B) Gibberellin
(C) Ethylene
(D) Caumarin
Answer: (D)
8. The part of seed which emerges out first during germination is
(A) Radicle
(B) Plumule
(C) Root
(D) Shoot
Answer: (A)
9. Indefinite growth of plants is due to presence of
(A) Meristemtic cells
(B) Parenchyma
(C) Permanent tissue
(D) Vascular tissue
Answer: (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: (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: (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: (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: (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: (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: (C)
16. The chemical substances like phenolics, caumarins, ferulic acid are
(A) Growth harmones
(B) Growth inhibitors
(C) Germination inhibitors
(D) Germination promoters
Answer: (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: (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: (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: (D)
20. Which of the following growth harmones in plant is influenced by light?
(A) Gibberellin
(B) Cytokinin
(C) Auxin
(D) Ethylene
Answer: (C)