MCQ
Semiconservative model of $DNA$ replication was proposed by which workers in eukaryotes
- ATaylor, Woods and Hughes
- ✓Messelson and Stahl
- CNirenberg and Khorana
- DWatson and Crick
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| Column $- I$ | Column $- II$ |
| A- Tapetum | i- Degenerate during development |
| B- Intine | ii- Resistant organic materials |
| C- Vegetative cell | iii- Pollen tube |
| D- Sporopollenin | iv- Provide nourishment to pollen grains |