MCQ on Plant Tissues | Wood Anatomy MCQs
1. The activity of the cambium ring is influenced by
(a) transpiration
(b) climatic changes
(c) respiration
(d) None of these
Ans.
2. Reactivation of cambium takes place during
(a) winter season
(b) spring season
(c) Both (a) and (b)
(d) None of these
Ans.
3. The cambium becomes more active during spring season and forms plenty of xylem vessels with wide cavities called
(a) spring wood
(b) autumn wood
(c) Both (a) and (b)
(d) None of these
Ans. a
4. Spring wood is called as
(a) autumn wood
(b) early wood
(c) late wood
(d) None of these
Ans. b
5. Autumn wood is formed in winter and also called as
(a) early wood
(b) late wood
(c) spring wood
(d) None of these
Ans. b
6. Concentric rings in transverse section of stem formed is autumn and winter season are called as
(a) transverse rings
(b) parallel rings
(c) growth rings
(d) All of these
Ans. c
7. Scientific study of tree rings or growth rings are called as
(a) ornithology
(b) parasitology
(c) dendrochronology
(d) cytology
Ans. c
Plant Tissue Culture MCQ with Answers pdf
8. Major part of annual rings is formed by
(a) autumn wood
(b) spring wood
(c) Both (a) and (b)
(d) None of these
Ans. b
9. Autumn wood is present at the ……… of annual ring .
(a) beginning
(b) end
(c) middle
(d) None of these
Ans. b
10. Xylem fibres are fewer in numbers in
(a) autumn wood
(b) spring wood
(c) dark
(d) All of these
Ans.
11. Dark colour wood is found in
(a) autumn wood
(b) spring wood
(c) Both (a) and (b)
(d) None of these
Ans. a
12. The cells of this wood get filled with resins or tannins
(a) heartwood
(b) sapwood
(c) spring wood
(d) All of these
Ans. a
13. Heartwood is also known as
(a) sapwood
(b) alburnum
(c) duramen
(d) None of these
Ans. c
14. Alburnum is the another name of
(a) sapwood
(b) duramen
(c) heartwood
(d) None of these
Ans. a
15. Functional secondary xylem is found in
(a) duramen
(b) alburnum
(c) spring wood
(d) All of these
Ans. b
Plant Tissue Culture MCQ
16. Which of the following is lighter in colour and weight ?
(a) Autumn wood
(b) Heartwood
(c) Sapwood
(d) None of these
Ans. c
17. Tracheids and vessels are not plugged by tyloses in
(a) heart wood
(b) sapwood
(c) Both (a) and (b)
(d) None of these
Ans. b
18. Which of the following wood is durable ?
(a) Heartwood
(b) Softwood
(c) Sapwood
(d) None of these
Ans. a
19. Gymnosperm wood is
(a) hardwood
(b) softwood
(c) Both (a) and (b)
(d) None of these
Ans. b
20. Tracheids percentage is 90-95 % in
(a) hardwood
(b) softwood
(c) Both (a) and (b)
(d) None of these
Ans. b
21. The age of tree by counting the annual rings is called
(a) dendrochronology
(b) dendrology
(c) chronology
(d) countrology
Ans. a
22. The light coloured part in an annual ring is
(a) heartwood
(b) latewood
(c) earlywood
(d) sapwood
Ans. c
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23. The sapwood is converted into heartwood by
(a) the formation of tyloses
(b) deposition of resins , oils and gums
(c) degeneration of protoplast of living cells
(d) All of the above
Ans. d
24. Living cells are not present in
(a) periderm
(b) sapwood
(c) heartwood
(d) bark
Ans. c
25. Cambium is most active during
(a) winters
(b) rainy season
(c) snow areas
(d) summers
Ans. d
26. What does heartwood provides to the stems ?
(a) Mechanical support
(b) Conduction of water
(c) Transport of minerals
(d) Strength
Ans. a
27. Accumulation of organic materials like tannis resins oils and gums in the innermost layer of stem provides which colour to the secondary xylem ?
(a) Red
(b) Dark brown
(c) Brown
(d) Orange
Ans. b
28. Age of plant can be determined by
(a) potometer
(b) sphygmometer
(c) increment boreer
(d) None of these
Ans. c
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30. The new xylary elements have
(a) narrow vessels
(b) wide vessels
(c) deep vessels
(d) bread vessels
Ans. a
30. Which region in heartwood is light in colour ?
(a) Innermost region
(b) Outer most region
(c) Middle region
(d) Peripheral region
Ans. d
31. Cork cambium results in the formation of cork which becomes impermeable to water due to the accumulation of
(a) resins
(b) suberin
(c) lignins
(d) tanins
Ans. b
32. One of the following undergoes decay when exposed to air
(a) sapwood
(b) hardwood
(c) heartwood
(d) light wood
Ans. a
33. In an old tree water is conducted through
(a) heartwood
(b) hardwood
(c) sapwood
(d) softwood
Ans. c
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34. Which of the following plant product is the hardest ?
(a) Lignin
(b) Cutin
(c) Suberin
(d) Sporopollenin
Ans. d
35. Which one of the following is resistant to enzyme action ?
(a) Cork
(b) Wood fibre
(c) Pollen exine
(d) Leaf cuticle
Ans. c
36. Duramen is present in
(a) inner region of secondary wood
(b) part of sapwood
(c) outer region of secondary wood
(d) region of pericycle
Ans. a
37. Growth rings are either absent or are not sharply demorcated in
(a) temperate deciduous trees
(b) tropical evergreen
(c) temperate hot regions
(d) tropical deciduous
Ans. b
38. The vascular cambial ring of a dicot stem is
(a) primary in origin
(b) secondary in origin
(c) tertiary in origin
(d) partly primary and partially secondary in origin
Ans. d
39. Closing layers of lenticels may show deposition of
(a) cutin
(b) pectin
(c) lignin
(d) suberin
Ans. d
40. Which of the following monocot shows anamalous secondary growth ?
(a) Maize
(b) Wheat
(c) Dracena
(d) Rice
Ans. c
