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One growth ring is formed per year and ...

One growth ring is formed per year and
(a) It is called as annula ring
(b) It is composed of spring and autumn wood
(c ) It is result of seasonal activity of cambium
(d) It is very distinct in plants of tropical climate

A

(a), (b) and (c ) are wrong

B

(a), (b) , (c ) and (d) are correct

C

Only (d) incorrect

D

(b) , (c ) and (d) are correct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the growth ring formation in plants, let's analyze each statement step by step. ### Step-by-Step Solution: 1. **Understanding Growth Rings**: - Growth rings, also known as annual rings, are formed in the secondary xylem of trees and woody plants. Each ring represents one year of growth. 2. **Statement (a)**: "It is called as annula ring". - The term "annual ring" is indeed used to describe the growth ring formed each year. This statement is correct. 3. **Statement (b)**: "It is composed of spring and autumn wood". - Growth rings are composed of two types of wood: spring wood (formed during the growing season when the cambium is highly active) and autumn wood (formed later in the season when cambium activity decreases). This statement is also correct. 4. **Statement (c)**: "It is result of seasonal activity of cambium". - The cambium layer is responsible for the production of new xylem and phloem. Its activity varies with the seasons, leading to the formation of distinct growth rings. This statement is correct as well. 5. **Statement (d)**: "It is very distinct in plants of tropical climate". - In tropical climates, the conditions are relatively uniform throughout the year, leading to less distinct growth rings compared to temperate regions where seasonal changes are more pronounced. Therefore, this statement is incorrect. 6. **Conclusion**: - Based on the analysis, statements (a), (b), and (c) are correct, while statement (d) is incorrect. Thus, the correct answer is that only statement (d) is incorrect. ### Final Answer: The incorrect statement is (d): "It is very distinct in plants of tropical climate". ---
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