Which of the statements given below is not true about formation of Ann...
Formation of Annual Rings in Trees
Annual rings are the concentric circles that are visible on the cross-section of a tree trunk. They represent the growth of the tree over a year. The following are the true statements about the formation of annual rings in trees:
a) Annual ring is a combination of spring wood and autumn wood produced in a year.
- Springwood: It is the first layer of wood that is formed during the growing season. It is characterized by large, thin-walled cells that are formed when the tree receives plenty of water and nutrients.
- Autumnwood: It is the second layer of wood that is formed towards the end of the growing season. It is characterized by small, thick-walled cells that are formed when the tree's growth slows down.
b) Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.
- Cambium: It is a thin layer of tissue that lies between the bark and the wood of a tree. It is responsible for the growth of the tree.
- Earlywood: It is the light-colored band of tissue that is formed during the early part of the growing season. This wood is characterized by large, thin-walled cells.
- Latewood: It is the dark-colored band of tissue that is formed towards the end of the growing season. This wood is characterized by small, thick-walled cells.
c) Activity of cambium depends upon variation in climate.
- Climate: The activity of cambium is influenced by variations in temperature and moisture. In regions with a distinct growing season, trees produce annual rings that are clearly visible.
d) Annual rings are not prominent in trees of temperate region.
- This statement is false. In fact, trees in temperate regions produce very prominent annual rings. The distinct seasonal changes in temperature and moisture make the growth patterns of these trees very clear.
In conclusion, the formation of annual rings in trees is influenced by various factors such as the activity of cambium, seasonal changes, and climate. The rings provide important information about the age, growth rate, and environmental conditions of the tree.
Which of the statements given below is not true about formation of Ann...
Annual rings are not prominent in trees of temperate region is not true about formation of Annual Rings in trees.
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.
Hence, the correct option is (D).
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