In temperate region plants, the wood with fewer xylary elements and narrow vessels, is termed as:-
1. Spring wood
2. Autumn wood
3. Sap wood
4. Heart wood
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the wrong statement in context of heartwood.
(1) Organic compounds are deposited in it
(2) it is highly durable
(3) It conducts water and minerals efficiently
(4) It comprises dead elements with highly lignified walls
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the wrong statement in the context of heartwood:
1. It is highly durable
2. It conducts water and minerals efficiently
3. It comprises dead elements with highly lignified walls
4. Organic compounds are deposited in it
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAge 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 maidenhair fern
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the statements given below is not true about the formation of Annual Rings in trees?
1. | Annual rings are not prominent in trees of temperate regions. |
2. | Annual rings are a combination of spring wood and autumn wood produced in a year. |
3. | Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively. |
4. | Activity of cambium depends upon variation in climate. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe feature which is common to both heartwood and sapwood is
1. Both are the regions of secondary xylem
2. Both are involved in the conduction of water.
3. Both comprise dead elements with the accumulation of aromatic compounds.
4. Both are located in the central layers of the stem.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe springwood present in an annual ring
1. Is dark colored
2. Has high density than autumn wood
3. Has abundant fibers
4. Has low density than autumn wood
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the incorrect match with respect to wood characters given in A, B, C column
A B C
1. | Early Wood | Large no. of xylary elements |
Springwood | wide cavities |
2. | Latewood | Few xylary elements |
Autumn wood | Narrow cavities |
3. | Heartwood | Dark brown in Colour |
Dead elements | Filled with resins and gums |
4. | Sapwood | Light in color | Living elements | Conducts minerals only. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology