Which of the following cannot be considered as a feature of mutation?

Options

A. Are random and directioniess
B. Can be small and large
C. Can cause evolution suddenly
D. Can bring change only when they accumulation over period of time

Answer

To solve the question "Which of the following cannot be considered as a feature of mutation?", we will analyze each option provided and determine which one does not accurately describe a feature of mutation.

### Step-by-Step Solution:

1. **Understand the Concept of Mutation**:
- Mutation refers to changes in the genetic material (DNA) of an organism. These changes can be small (point mutations) or large (chromosomal mutations) and can occur randomly.

2. **Evaluate the Options**:
- **Option 1**: "Are random and directionless"
- This is a correct feature of mutations. Mutations occur randomly and are not directed towards a specific outcome.
- **Option 2**: "Can be small and large"
- This is also a correct feature. Mutations can vary in size, from a single nucleotide change to large chromosomal alterations.
- **Option 3**: "Can cause evolution suddenly"
- This is correct as well. Mutations can lead to significant changes in an organism that may contribute to evolutionary processes.
- **Option 4**: "Can bring change only when they are accumulated over a period of time"
- This statement is incorrect. Mutations can lead to observable changes in an organism immediately, not necessarily requiring accumulation over time.

3. **Identify the Incorrect Feature**:
- Based on the analysis, the fourth option is the one that cannot be considered a feature of mutation. Mutations can cause changes right away, and they do not have to accumulate over time to be effective.

4. **Conclusion**:
- The option that cannot be considered a feature of mutation is **Option 4**: "Can bring change only when they are accumulated over a period of time."