A) Annual ring is a combination of spring wood and autumn wood produced in a year
B) Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.
C) Activity of cambium depends upon variation in climate.
D) Annual rings are not prominent in trees of temperate region.
Correct Answer: D
Solution :
Growth rings are formed by the seasonal activity of cambium. In plants of temperate regions, cambium is more active in spring and less active in autumn seasons. In temperate regions climatic conditions are not uniform throughout the year. However, in tropics climatic conditions are uniform throughout the year.
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