MCQ
When does the angiosperm appeared on Earth?
- ADevonian
- BCambrian
- ✓Early cretaceous
- DVolvox
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| A. Magnesium | (i) dehydrogenase |
| B. Nickel | (ii) ion exchange |
| C. Zinc | (iii) chlorophyll |
| D. Potassium | (iv) urease |