A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe outer hard layer of the pollen wall is made up of:
1. | Callose, which is easily digested by enzymes |
2. | Sporopollenin, which is resistant to all enzymes |
3. | Hemicellulose, which is difficult to digest by enzymes |
4. | Calcium pectate, which is easily digested by enzymes |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAt what temperature pollens can be stored for years in liquid nitrogen?
1. | 0°C | 2. | -100°C |
3. | -196°C | 4. | 4°C |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA | B | C | D | |
1. | Epidermis | Endothecium | Middle layers | Tapetum |
2. | Epithelium | Endothelium | Middle layers | Tapetum |
3. | Endothecium | Epidermis | Tapetum | Middle layers |
4. | Epithelium | Endothelium | Tapetum | Middle layers |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology