MCQ
Cardiac centre is present in
- ✓Medulla oblongata
- BCerebrum
- CPons
- DEpithalamus
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$I.$ Cytokinins especially help in delaying senescence.
$II.$ Auxins are involved in regulating apical dominance.
$III.$ Ethylene is especially useful in enhancing seed germination.
Gibberellins are responsible for immature falling of leaves