11. Give full form of 2-4-D
A. 2-4 dichloro phenoxy acetic acid
B. 2-4 dichloro butyric acid
C. 2-4 dichloro nepthalic acetic acid
D. 2-4 dichloro ethylenic acid
Answer : Option A
12. Which of the following stimulates growth in the internode region ?
13. Oat - coleoptile test (coleoptile-test) is conducted for which hormone ?
A. Abscisic acid
B. Gibberrelic acid (GA)
C. Indole acetic acid (IAA)
D. Indole naphthalne acetic acid (INAA)
Answer : Option C
14. Gibberrelin participate in which of the following process?
A. Removal of seed dormancy
B. Developing seed less fruit
C. Growth of internodes
D. All of the above
Answer : Option D
15. Tropic movement is due to
A. Bidirectional effect of environmental factors on plant parts
B. Unidirectional effect of environmental factors on plant parts
C. Multidirectional effect of environmental factors on plant parts
D. No effect of environmental factors on plant parts
Answer : Option B
16. Which is the correct sequence for different phases of growth?
A. Cell formation of cell differentiation- cell elongation
B. Cell formation - cell elongation- cell differentiation
C. Cell differentiation- cell elongation- cell formation
D. Cell differentiation- cell formation- cell elongation
Answer : Option B
17. What is the period of cell formation to cell differntiation ?
A. Sigmoid graph
B. Normal growth period
C. Maximum growth period
D. Grand period of growth
Answer : Option D
18. What is the required temperature for growth in most of the plants?
A. \(20-30 ^o C\)
B. \(35-40^ o C\)
C. \(10-15^ o C\)
D. \(15-20^ o C\)
Answer : Option A
19. Zeatin is an example of
20. piral developement of tendrils?