In which of the following organism, pigments are similar to that found in higher plants?

Options

A. Nostoc
B. Euglena
C. Gonyaulax
D. Slime mould

Answer

To solve the question "In which of the following organisms, pigments are similar to that found in higher plants?", we will analyze each of the given options step by step.

### Step 1: Understand the Question
The question asks us to identify which organism has pigments similar to those found in higher plants. Higher plants primarily contain chlorophyll a and b, which are essential for photosynthesis.

### Step 2: Analyze Each Option
1. **Slime Mold**:
- Slime molds are saprophytic organisms that feed on decaying organic matter.
- They do not perform photosynthesis and therefore do not contain chlorophyll or similar pigments.
- **Conclusion**: This option is incorrect.

2. **Goniulex**:
- Goniulex is a dinoflagellate found in marine environments.
- While dinoflagellates can contain pigments, they often have different types of pigments (like peridinin) that are not the same as those found in higher plants.
- **Conclusion**: This option is incorrect.

3. **Euglena**:
- Euglena is a unicellular organism that can photosynthesize during the day due to the presence of chlorophyll.
- However, at night, it can switch to a heterotrophic mode of nutrition, which makes it different from higher plants that are strictly autotrophic.
- The chlorophyll present in Euglena is similar to that of higher plants, but its overall classification as an organism is different.
- **Conclusion**: This option is also incorrect for the context of the question.

4. **Nostoc**:
- Nostoc is a type of cyanobacteria (often referred to as blue-green algae).
- It contains chlorophyll a, which is the same pigment found in higher plants.
- Nostoc is capable of photosynthesis and also participates in nitrogen fixation.
- **Conclusion**: This option is correct.

### Step 3: Final Answer
Based on the analysis, the organism that has pigments similar to those found in higher plants is **Nostoc**.