Which of the following are correct for numerical taxonomy ?
(i) Based on all observed characteristics.
(ii) Uses chemical constituents of the plant to resolved confusion .
(iii) Based on cytological information like chromosome number , structure and behavior .
(iv) Number and codes assigned to a few characters.
(v) At the same time , hundreds of characters can be considered .
(vi) Carried out using computers .

Options

A. i, v, vi
B. iii, iv ,v
C. i, iv , v , vi
D. ii , ii , v , vi

Answer

To solve the question regarding which statements are correct for numerical taxonomy, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding Numerical Taxonomy**:
- Numerical taxonomy is a branch of taxonomy that classifies organisms based on numerical methods, taking into account various characteristics.

2. **Evaluating Each Statement**:
- **Statement (i)**: "Based on all observed characteristics."
- This statement is **correct**. Numerical taxonomy does consider all observable characteristics of organisms to classify them.

- **Statement (ii)**: "Uses chemical constituents of the plant to resolve confusion."
- This statement is **incorrect**. Numerical taxonomy does not specifically use chemical constituents for classification; it focuses on observable traits.

- **Statement (iii)**: "Based on cytological information like chromosome number, structure and behavior."
- This statement is **incorrect**. The study of cytological information is known as cytotaxonomy, not numerical taxonomy.

- **Statement (iv)**: "Number and codes assigned to a few characters."
- This statement is **incorrect**. Numerical taxonomy involves assigning numbers and codes to many characters, not just a few.

- **Statement (v)**: "At the same time, hundreds of characters can be considered."
- This statement is **correct**. Numerical taxonomy can analyze a large number of characteristics simultaneously, especially with the aid of computers.

- **Statement (vi)**: "Carried out using computers."
- This statement is **correct**. Numerical taxonomy often utilizes computer software to analyze data and classify organisms.

3. **Conclusion**:
- The correct statements are (i), (v), and (vi). Therefore, the answer to the question is that statements (i), (v), and (vi) are correct for numerical taxonomy.

### Final Answer:
The correct statements for numerical taxonomy are:
- (i) Based on all observed characteristics.
- (v) At the same time, hundreds of characters can be considered.
- (vi) Carried out using computers.