Pigment composition of higher plants resembles very closely that of

Options

A. Cyanobacteria
B. Chlorophyceae
C. Diatoms
D. Phaeophyceae or Rhodophyceae

Answer

To solve the question regarding the pigment composition of higher plants, we will analyze the options provided and determine which one closely resembles that of higher plants.

### Step-by-Step Solution:

1. **Understand the Characteristics of Higher Plants**:
- Higher plants are eukaryotic organisms, meaning they have complex cells with a nucleus.
- They are multicellular and contain chloroplasts, which are the sites of photosynthesis.

2. **Identify the Role of Pigments in Higher Plants**:
- The primary pigment involved in photosynthesis in higher plants is chlorophyll, which gives plants their green color.
- Chlorophyll is essential for absorbing light energy, which is then used to convert carbon dioxide and water into glucose and oxygen during photosynthesis.

3. **Evaluate the Options**:
- **Cyanobacteria**: These are prokaryotic organisms (not eukaryotes) and while they do contain chlorophyll, they are not closely related to higher plants.
- **Chlorophyceae**: This group includes green algae, which are eukaryotic and contain chlorophyll similar to that found in higher plants. They also store food in the form of starch, which is a characteristic shared with higher plants.
- **Diatoms**: These are single-celled protists and do not share the multicellular structure of higher plants.
- **Pheophyceae (Brown Algae)**: These contain different pigments (like phycoxanthin) and are not closely related to the green pigments of higher plants.
- **Rhodophyceae (Red Algae)**: These contain phycoerythrin, giving them a red color, which is not similar to the green pigments of higher plants.

4. **Conclusion**:
- After evaluating all the options, **Chlorophyceae** (green algae) closely resembles the pigment composition of higher plants due to the presence of chlorophyll and similar storage of food in starch.

### Final Answer:
The pigment composition of higher plants resembles very closely that of **Chlorophyceae** (green algae).

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