NEET 2019
- Exam
- NEET
- Year
- 2019
- Subject
- Botany
- Chapter
- Anatomy of Flowering Plants
NEET 2019 · Botany · Anatomy of Flowering Plants
Which of the statements given below is not true about the formation...
Which of the statements given below is not true about the formation of annual rings in trees?
Options
- AAnnual ring is a combination of spring wood and autumn wood produced in a year.
- BDifferential activity of cambium causes light and dark bands of tissue - early and late wood respectively.
- CActivity of cambium depends upon variation in climate.
- DAnnual rings are not prominent in trees of temperate region.
Correct answer
D. Annual rings are not prominent in trees of temperate region.
Step-by-step solution
The activity of cambium is non-uniform in plants growing in regions of favorable climatic conditions (rainy or spring season) that alternate regularly with unfavorable climatic conditions (dry hot summer or cold winter). In temperate climates, the cambium is more active giving rise to a higher number of vessels with greater activities, while in winter, it becomes less active and forms narrower and smaller vessels. Both spring and autumn wood contribute for an annual ring, forming one ring a year. Annual rings are prominent in trees of temperate region.