MCQ
First life on earth was:
- ACyanobacteria.
- ✓Chemoheterotrophs.
- CAutotrophs.
- DPhotoautotrophs.
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$I.$ Cytokinin - Delay of leaf senescence
$II.$ Auxin - Apical dominance
$III.$ Ethylene - Seed germination
$IV.$ Gibberellins - Immature falling of leaves