Suppose there were plants that had a high concentration of Chlorophyll-b, but lacked chlorophyll-a, would it carry out photosynthesis? Then why do plants have chlorophyll-b and other accessory pigments?

Explanation

### Step-by-Step Solution:

1. **Understanding the Role of Chlorophyll-a**:
- Chlorophyll-a is the primary pigment involved in photosynthesis. It is essential for the process because it directly participates in the light reactions of photosynthesis by capturing light energy.

2. **Absence of Chlorophyll-a**:
- If a plant lacks chlorophyll-a entirely, it cannot carry out photosynthesis. This is because chlorophyll-a is responsible for converting light energy into chemical energy, which is crucial for the synthesis of glucose and other organic compounds.

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