Chlorophyceae are grass green due to the dominance of pigment

Options

A. Chlorophyll a, c
B. Chlorophyll b, a
C. Chlorophyll d, c
D. Chlorophyll a, d

Answer

To solve the question regarding why Chlorophyceae are grass green due to the dominance of a specific pigment, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Chlorophyceae**:
- Chlorophyceae, commonly known as green algae, are a group of photosynthetic organisms that are primarily found in freshwater environments. They are characterized by their green color.

**Hint**: Remember that "Chloro" means green, indicating the presence of green pigments.

2. **Identifying the Pigments**:
- The green color in Chlorophyceae is due to the presence of chlorophyll pigments. The two main types of chlorophyll found in these organisms are chlorophyll A and chlorophyll B.

**Hint**: Focus on the types of chlorophyll that contribute to the green color.

3. **Role of Chlorophyll A and B**:
- Chlorophyll A is the primary pigment involved in photosynthesis, while chlorophyll B assists in capturing light energy. Together, they dominate the pigment composition in Chlorophyceae, leading to their characteristic green color.

**Hint**: Consider how chlorophyll A and B work together in the process of photosynthesis.

4. **Comparison with Other Algae**:
- In contrast, other types of algae, such as brown algae, contain chlorophyll A and C, which gives them a brownish color. Red algae contain chlorophyll D. This differentiation helps to clarify why Chlorophyceae are specifically green.

**Hint**: Think about how different pigments lead to different colors in various types of algae.

5. **Conclusion**:
- Therefore, the dominance of chlorophyll A and B in Chlorophyceae is what makes them grass green.

**Hint**: Summarize the main point: Chlorophyceae are green due to the presence of chlorophyll A and B.

### Final Answer:
Chlorophyceae are grass green due to the dominance of the pigments chlorophyll A and B.