Growth is a Irreversible increase in size

1. Growth is a
(A) Irreversible increase in size
(B) Reversible increase in size
(C) Reversible increase in shape
(D) Increase in volume
Answer: (A)

2. The growth of plant differs from growth of animals in being
(A) Diffused
(B) Localised
(C) Localised and diffused
(D) Uniform
Answer: (B)

3. The seed which possess the ability to germinate in suitable favourable condition is called
(A) Quiescent
(B) Viable
(C) Dry
(D) Darmant
Answer: (B)

4. Dormancy of seed is
(A) Phase of active growth
(B) Phase of inactive growth
(C) Phase of stimulated growth
(D) Dead condition
Answer: (B)

5. The condition of viable seed when seeds do not germinate even in presence of favourable environmental condition is called
(A) Dormancy
(B) Secondary Dormancy
(C) Dead seed
(D) None of these
Answer: (A)

6. Quiescence means-
(A) Dormancy due to genetic reasons
(B) Dormancy due to internal conditions
(C) Dormancy due to external unfavourable conditions
(D) Dormancy due to immature embryo
Answer: (C)

7. The growth in dormant organs is
(A) Completely stopped
(B) Continuous
(C) Temporarily arrested
(D) Permanently arrested
Answer: (C)

8. Dormancy in seeds of xanthium is due to
(A) Seed coat imperable to water
(B) Seed coat imperable to gases
(C) Need for after ripening period
(D) Mechanically resistant seed coat
Answer: (B)

9. Dormancy, if occur due to internal factors, it is called
(A) Imposed dormancy
(B) Innate dormancy
(C) Quiescence
(D) Dormancy
Answer: (B)

10. Softening or rupturing of hard seed coat for breaking dormancy is called
(A) Villing
(B) Vernalization
(C) Stratification
(D) Scarification
Answer: (D)

11. The chemical substances like phenolics, caumarins, ferulic acid are
(A) Growth harmones
(B) Growth inhibitors
(C) Germination inhibitors
(D) Germination promoters
Answer: (C)

12. 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)

13. Germination inhibitors leached out by one plant may inhibit germination of seeds of other plants is called as
(A) Allopathy
(B) Allelopathy
(C) Competitive absorption
(D) Aromapathy
Answer: (B)

14. Which of the following growth regulator is not used to break dormancy?
(A) Ethylene
(B) Gibberellins
(C) Cytokinins
(D) Abscisic acid
Answer: (D)

15. Keeping seeds in well aerated, moist condition at 1-100C temperature for weeks or months is called
(A) Pre-ripening
(B) Stratification
(C) Scarification
(D) Impaction
Answer: (B)

16. By which method tasta is made permeable to water?
(A) Vernalization
(B) Scarification
(C) Stratification
(D) Impaction
Answer: (B)

17. Which of the following is a growth inhibitor
(A) Auxin
(B) Cytokinin
(C) Gibberilins
(D) ABA
Answer: (D)

18. Threshing, chopping, rupturing seeds by hands or machines is called
(A) Scarification
(B) Chemical scarification
(C) Mechanical scarification
(D) Strafication
Answer: (C)

19. Imposed dormancy can be caused due to
(A) Immature embryo
(B) Hard and resistant seed coats
(C) Non availability of water and O2
(D) Mature embryo
Answer: (C)

20. The type of germination shown by plants of marshy land is
(A) Hypogeal
(B) Epigeal
(C) Viviparous
(D) None of these
Answer: (C)