State true(T) or false(F) to the given statements and select the correct option.
( a ) Annual rings are distinct in plants growing in temperate regions.
( b ) Lenticels occur in most woody trees and permit the exchange of gases.
( c ) Due to stelar secondary growth, central cylinder of wood surrounded by secondary phloem is formed.
( d ) The cells of endodermis opposite to protoxylem divide to give rise vascular cambium in dicot roots.

Options

A. a(T), b(T), c(F), d(F)
B. a(T), b(T), c(T), d(F)
C. a(T), b(F), c(T), d(F)
D. a(F), b(F), c(T), d(T)

Answer

To solve the question, we need to evaluate each statement one by one and determine whether they are true (T) or false (F).

### Step-by-Step Solution:

**(a) Annual rings are distinct in plants growing in temperate regions.**
- **Explanation:** Annual rings are formed due to the seasonal growth patterns of trees. In temperate regions, trees experience distinct seasons (spring, summer, autumn, and winter), which leads to the formation of clear annual rings. Therefore, this statement is **True (T)**.

**(b) Lenticels occur in most woody trees and permit the exchange of gases.**
- **Explanation:** Lenticels are small openings in the bark of woody plants that allow for gas exchange between the internal tissues and the atmosphere. They are indeed present in most woody trees. Thus, this statement is **True (T)**.

**(c) Due to stelar secondary growth, central cylinder of wood surrounded by secondary phloem is formed.**
- **Explanation:** Stelar secondary growth refers to the increase in thickness of the plant due to the activity of the vascular cambium, which produces secondary xylem (wood) and secondary phloem. This statement is somewhat misleading because while secondary growth does result in the formation of wood and phloem, the central cylinder is primarily made up of xylem. Therefore, this statement is **False (F)**.

**(d) The cells of endodermis opposite to protoxylem divide to give rise to vascular cambium in dicot roots.**
- **Explanation:** In dicot roots, the vascular cambium is formed from the pericycle, not from the endodermis. The endodermis does not contribute to the formation of vascular cambium. Therefore, this statement is **False (F)**.

### Summary of Answers:
- (a) True (T)
- (b) True (T)
- (c) False (F)
- (d) False (F)

### Correct Option:
The correct option based on the evaluations is:
(a) T, (b) T, (c) F, (d) F.

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