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 light-dependent reactions of photosynthesis, where it absorbs light energy and converts it into chemical energy.
- It acts as an antenna molecule, getting excited by light absorption and releasing electrons, which are crucial for the process of photophosphorylation (both cyclic and non-cyclic).

2. **Consequences of Lacking Chlorophyll A**:
- If a plant lacks chlorophyll A, it cannot form the reaction centers required for photosystem I and photosystem II.
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