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The PGR which causes apical hook formati...

The PGR which causes apical hook formation in dicot seeding also helps in
A. Overcoming the apical dominance
B. Widely used as herbicides
C. Delays senescence
D. Induces flowering in mango
E. Antagonistic to gibberllins
F. Causes thinning of cottton, cherry and walnut.

A

A, C & F

B

B & D

C

D & F

D

D, E & F

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the plant growth regulator (PGR) that causes apical hook formation in dicot seedlings and its additional functions, we will analyze each option step by step. ### Step-by-Step Solution: 1. **Identify the PGR responsible for apical hook formation**: - The PGR that causes apical hook formation in dicot seedlings is **ethylene**. This is a crucial point as it sets the context for the rest of the options. 2. **Evaluate each option**: - **A. Overcoming the apical dominance**: This function is primarily associated with **cytokinins**, not ethylene. So, this option is incorrect. - **B. Widely used as herbicides**: **Auxins** are the PGRs that are commonly used as herbicides. Ethylene does not serve this purpose, making this option incorrect. - **C. Delays senescence**: **Cytokinins** are known for delaying senescence (aging) in plants. Ethylene does not have this function, so this option is also incorrect. - **D. Induces flowering in mango**: The hormone that induces flowering in mangoes is **ethylene**. Therefore, this option is correct. - **E. Antagonistic to gibberellins**: The hormone that acts antagonistically to gibberellins is **abscisic acid**, not ethylene. Thus, this option is incorrect. - **F. Causes thinning of cotton, cherry, and walnut**: Ethylene is known to cause thinning in these plants, making this option correct. 3. **Conclusion**: - The PGR that causes apical hook formation in dicot seedlings is ethylene, which also helps in inducing flowering in mango (option D) and causes thinning of cotton, cherry, and walnut (option F). Therefore, the correct answer is **D and F**. ### Final Answer: The PGR which causes apical hook formation in dicot seedlings also helps in **D. Induces flowering in mango** and **F. Causes thinning of cotton, cherry, and walnut**. ---
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PHYSICS WALLAH-PLANT GROWTH AND DEVELOPMENT-LEVEL-2
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  2. Native auxin (endogenous) is transported in the plant

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  3. The PGR which causes apical hook formation in dicot seeding also helps...

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  4. The natural plants hormones were first isolated from

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  5. Which of the following exerts profound effect on the reproductive grow...

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  6. Which of the following induces femaleness in plants?

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  7. Which one is prevents over-ripening of banana and browning of cut frui...

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  8. Read the following statements with respect to vernalization and select...

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  9. The plant hormone, which synthesized in root and translocated to aeria...

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  10. The elongation of genetically dwarf plants is brought about by the app...

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  11. A flash of red light followed by a flash of far-red light given during...

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  12. Gibberellic acid has been successfully employed to induce flowering

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  13. Plants which require the exposure to light for a period exceeding a we...

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  14. Which accelerates the abscission in liower and fruit like thinning of ...

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  15. On the basis of correlation, find the correct option from columns

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  17. Which one of the following pair is not correctly matched

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  18. A store placed a large basket of fruit containing oranges and unripe b...

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  19. How does pruning help in making the hedge dense

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