Artifical systems have equal weightage to to vegetative and sexual characteristics, this is not acceptable because often____characters are more easily affected by environment.

Options

A. vegetative characters
B. sexual
C. anatomical characters which are adaptive in nature
D. physiological

Explanation

To solve the question, we need to fill in the blank with the appropriate term that describes the type of characters that are more easily affected by the environment.

### Step-by-Step Solution:

1. **Understand the Question**: The question states that artificial classification systems give equal weightage to vegetative and sexual characteristics. We need to identify which type of characters is more susceptible to environmental changes.

2. **Identify the Types of Characteristics**:
- **Vegetative Characteristics**: These include traits such as leaf shape, size, color, and overall plant morphology.
- **Sexual Characteristics**: These include traits related to reproduction, such as flower structure, number of stamens, and other reproductive features.

3. **Consider Environmental Impact**:
- Vegetative characteristics are often influenced by environmental factors such as light, water availability, soil type, and temperature. For example, the size and color of leaves can change based on the amount of sunlight a plant receives.
- Sexual characteristics, while they can also be affected by the environment, tend to be more stable and less variable compared to vegetative traits.

4. **Conclude the Answer**: Given that vegetative characters are more easily influenced by environmental changes, we can fill in the blank with "vegetative."

5. **Final Answer**: The complete statement reads: "Artificial systems have equal weightage to vegetative and sexual characteristics, this is not acceptable because often vegetative characters are more easily affected by the environment."