Euglenoid species that have chlorophyll are

Options

A. obligate autotrophs
B. facultative autotrophs
C. facultative heterotrophs
D. obligate heterotrophs

Answer

To answer the question about the euglenoid species that have chlorophyll, we can follow these steps:

### Step 1: Understand the Characteristics of Euglenoids
Euglenoids are unicellular eukaryotic organisms that exhibit characteristics of both plants and animals. They belong to the kingdom Protista.

**Hint:** Remember that euglenoids can perform both photosynthesis and heterotrophic nutrition.

### Step 2: Identify the Role of Chlorophyll
Chlorophyll is a green pigment found in plants and some other organisms that allows them to perform photosynthesis. If an organism has chlorophyll, it can convert sunlight, carbon dioxide, and water into glucose and oxygen.

**Hint:** Chlorophyll indicates the ability to perform photosynthesis, which is a key trait of autotrophs.

### Step 3: Classify Euglenoids Based on Nutrition
Euglenoids can be classified based on their nutritional modes:
- **Autotrophs:** Organisms that produce their own food (e.g., through photosynthesis).
- **Heterotrophs:** Organisms that depend on other organisms for food.

Euglenoids with chlorophyll can perform photosynthesis, making them autotrophs.

**Hint:** Think about the difference between obligate and facultative autotrophs.

### Step 4: Distinguish Between Obligate and Facultative Autotrophs
- **Obligate Autotrophs:** These organisms can only produce their own food and cannot rely on other sources.
- **Facultative Autotrophs:** These organisms can perform photosynthesis but can also switch to heterotrophic nutrition if necessary.

Since euglenoids can switch between autotrophic and heterotrophic modes depending on the availability of light and nutrients, they are classified as facultative autotrophs.

**Hint:** Consider how euglenoids adapt to their environment when determining their nutritional classification.

### Conclusion
Based on the above analysis, the euglenoid species that have chlorophyll are classified as **facultative autotrophs**.

**Final Answer:** Facultative autotrophs