Age of a tree can be estimated by :
1. biomass
2. number of annual rings
3. diameter of its heartwood
4. its height and girth
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHeartwood differs from sapwood in
1. presence of rays and fibres
2. absence of vessels and parenchyma
3. having dead and non-conducting elements
4. being susceptible to pests and pathogens
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor a critical study of secondary growth in plants, which one of the following pairs is suitable :
1. Sugarcane and sunflower
2. Teak and pine
3. Deodar and fern
4. Wheat and maiden hair fern
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology