select the characters which are not applicable to the anatomy of dicot roots. (a) conjunctive tissue present (b) presnce of protein compounds in casparian strips © polyarch xylem bundles (d) presence of pericycle.

Options

A. a and b
B. b and d
C. c and d
D. b and c

Answer

To solve the question regarding the characters that are not applicable to the anatomy of dicot roots, we will analyze each option provided:

1. **Option (a): Conjunctive tissue present**
- In dicot roots, conjunctive tissue, which consists of parenchyma cells located between the xylem and phloem, is indeed present. Therefore, this statement is applicable to dicot roots.

2. **Option (b): Presence of protein compounds in Casparian strips**
- The Casparian strips in dicot roots are composed of suberin, which is a fatty or waxy substance, not a protein compound. Therefore, this statement is not applicable to dicot roots.

3. **Option (c): Polyarch xylem bundles**
- Dicot roots typically exhibit tetrarch vascular bundles, not polyarch. Polyarch xylem bundles are characteristic of monocot roots. Thus, this statement is also not applicable to dicot roots.

4. **Option (d): Presence of pericycle**
- The pericycle is present in dicot roots and plays a role in the formation of lateral roots. Hence, this statement is applicable.

### Conclusion:
The characters that are not applicable to the anatomy of dicot roots are:
- (b) Presence of protein compounds in Casparian strips
- (c) Polyarch xylem bundles

### Final Answer:
The correct options that are not applicable are (b) and (c).

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