Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

NEET-2023 [Plant-Growth-and-Development] [class-xi ]

• Abscisic Acid
• Indole-3-butyric Acid
• Gibberellic Acid
• Zeatin
Correct Option: C  [ Gibberellic Acid ]

Remark:

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: ATP is used at two steps in glycolysis.
Reason R: First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6- phosphate into fructose-1-6-diphosphate.
In the light of the above statements, choose the correct answer from the options given below is true,

NEET-2023 [Plant-Growth-and-Development] [class-xi ]

• Senescence
• Differentiation
• Dedifferentiation
• Development
Correct Option: C  [ Dedifferentiation ]

Remark:

Which hormone promotes intemode/petiole elongation in deep water rice?

NEET-2023 [Plant-Growth-and-Development] [class-xii ]

• 2, 4-D
• GA₃
• Kinetin
• Ethylene
Correct Option: D  [ Ethylene ]

Remark:

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :

NEET-2022 [Plant-Growth-and-Development] [class-xi ]

• ABA
• Gibberellin
• Ethylene
• Cytokinin
Correct Option: C  [ Ethylene ]

Remark:

Which one of the following plants does not show plasticity?

NEET-2022 [Plant-Growth-and-Development] [class-xi ]

• Cotton
• Coriander
• Buttercup
• Maize
Correct Option: D  [ Maize ]

Remark:

The gaseous plant growth regulator is used in plants to:

NEET-2022 [Plant-Growth-and-Development] [class-xi ]

• speed up the malting process
• promote root growth and root hair formation to increase the absorption surface
• help overcome apical dominance
• kill dicotyledonous weeds in the fields
Correct Option: B  [ promote root growth and root hair formation to increase the absorption surface ]

Remark:

The site of perception of light in plants during photoperiodism is:

NEET-2021 [Plant-Growth-and-Development] [class-xi ]

• Shoot apex
• Stem
• Axillary bud
• Leaf
Correct Option: D  [ Leaf ]

Remark:

The plant hormone used to destroy weeds in a field is:

NEET-2021 [Plant-Growth-and-Development] [class-xi ]

• IAA
• NAA
• 2,4-D
• IBA
Correct Option: C  [ 2,4-D ]

Remark:

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

NEET-2021 [Plant-Growth-and-Development] [class-xi ]

• Elasticity
• Flexibility
• Plasticity
• Maturity
Correct Option: C  [ Plasticity ]

Remark:

Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:

NEET-(Oct)2020 [Plant-Growth-and-Development] [class-xi ]

• Gibberellic acid
• Nitrate
• Ascorbic acid
• Chilling conditions
Correct Option: C  [ Ascorbic acid ]

Remark: