Which of the following has proved helpful in preserving pollens as fossils?
1. | Pollen kit | 2. | Cellulosic intine |
3. | Oil content | 4. | Sporopollenin |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPollen grains can be stored for several years in liquid nitrogen having a temperature of:
1. | –120 °C | 2. | –80 °C |
3. | –196 °C | 4. | –160 °C |
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