Growth and Development in Plants Set 2
On This Page
This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Growth and Development in Plants Set 2
Q1 | What is the reason of senescence leaf ?
- Ethylene
- Abscisic acid
- cytokinin
- Auxin
Q2 | Which hormone is responsible for bolting ?
- Auxin
- Cytokinin
- Gibberrelin
- Ethylene
Q3 | Which hormone is synthesized by root and endosperm?
- Auxin
- Cytokinin
- Gibberrelin
- Ethylene
Q4 | Which hormone is responsible for growth of leaf-apex ?
- IAA
- Zeatin
- Gibberrelin
- Ethylene
Q5 | How can a biannual plant be converted into an annual plant?
- By cold process of seeds
- By giving more light
- By giving more oxygen
- By giving more temperature
Q6 | Which of the following reaction is observed in droping of drocera due to insects ?
- Thigmonasty
- Chemotropis
- Photonasty
- Thigmotropism
Q7 | What is responsible for opening and closing of tulip flower ?
- Photonastic movement
- Geotropism
- Thermonasty
- Nictinasty
Q8 | By which reaction growth of cuscuta occurs on host plant ?
- Thigmotropism
- Chemtropism
- Thigmonasty
- Photonasty
Q9 | Which type of meristematic tissue is found in monocot plant for growth ?
- Intercalary meristematic tissue
- Apical meristem tissue
- Lateral meristem tissue
- Meristematic tissue
Q10 | Which of the following is increased in plants as a result of growth ?
- Dry volume
- Width
- Number
- Dry weight
Q11 | Which of the following is criteria for measurement of growth ?
- Number
- Weight
- Volume
- All a, b, c
Q12 | In which phase of growth size of vacuole increases ?
- Cell formation
- Cell elongation
- cell difterentiation
- Cell transfer
Q13 | What is the optimum temperature for growth of the plants ?
- 25 to 30oC
- 28 to 30oC
- 0 to 30oC
- 0 to 28oC
Q14 | Which apparatus is used for exact measuring of growth of plants in longitudinal axis ?
- Measuring scale
- Auxanometer
- Manometer
- Sphigomanometer
Q15 | Growth regulators are chemically ........
- Organic chemical
- Inorganic chemicals
- Minerals
- Vitamins
Q16 | From where auxin was isolated for the first time ?
- Coleoptile of oat
- Sperm cell of herring fish
- Paddy plant
- Human urine
Q17 | Which of the following should be used for the control of weeds in farms ?
- Cytokinin
- Auxin
- Gibberrelin
- Ethylene
Q18 | Which chemical induces formation of adventitious roots ?
- Gibberrelin
- IAA
- Abscisic acid
- Cytokinins
Q19 | Which is incorrect for the effects of auxin ?
- Induces +ve phototropism
- Induces growth and length in stem
- Shows apical dominance
- Induces -ve phototropism in roots
Q20 | Which of the following organic substance is growth inhibitor ?
- IBA
- ABA
- IAA
- GA
Q21 | From where indole acetic acid an organic substance was isolated for the first time ?
- Animal fat
- Gibberrela
- Human urine
- Fish
Q22 | Cytokinin is formed in which of the following region ?
- Region of cell elongation
- Regions of senescence
- Regions of cell division
- Regions of abscission
Q23 | Which hormone reduces the dominance of apical bud ?
- Auxin
- ABA
- Ethylene
- Cytokinin
Q24 | Which is incorrect option for cytokinin ?
- Retards senescence
- Secreted in the region of active cell division
- Increases dominance of apical bud
- Stimulates cell division
Q25 | Drooping of fruit, after fruit maturation (ripening) shows ........ .
- Increase in amount of auxin
- Decreases in amount of auxin
- Reduces in amount of ABA
- Increase gibberrelic acid