Use a check mark to select the eukaryote that gave rise to the membrane indicated by the yellow star in the drawing of the chlorarachniophyte algae.

Human Anatomy & Physiology (11th Edition)
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### Understanding Endosymbiosis in Chlorarachniophyte Algae

In this diagram, we're exploring the concept of endosymbiosis in chlorarachniophyte algae. The process is depicted in two main stages: primary and secondary endosymbiosis.

#### Diagram Explanation:

1. **Primary Endosymbiosis:**
   - **Phagocytic Eukaryote**: The first image shows a phagocytic eukaryote engulfing a photosynthetic organism. This process is labeled as "Primary endosymbiosis."
   - **Photosynthetic Eukaryote**: As a result, a photosynthetic eukaryote is formed. This eukaryote is marked with a check mark, indicating it as the correct answer to a question above the diagram.

2. **Secondary Endosymbiosis:**
   - **Second Phagocytic Eukaryote**: This stage begins with a second phagocytic eukaryote engulfing the photosynthetic eukaryote formed during primary endosymbiosis.
   - **Chlorarachniophyte**: The final outcome is the chlorarachniophyte, which contains multiple membranes. A yellow star indicates a specific membrane that has originated from the engulfed photosynthetic eukaryote.

#### Key Concepts:
- **Primary Endosymbiosis** results in the formation of a eukaryote capable of photosynthesis.
- **Secondary Endosymbiosis** leads to more complex cellular structures, such as those observed in chlorarachniophytes.

This diagram highlights the evolutionary significance of endosymbiotic events in developing cellular complexity.
Transcribed Image Text:### Understanding Endosymbiosis in Chlorarachniophyte Algae In this diagram, we're exploring the concept of endosymbiosis in chlorarachniophyte algae. The process is depicted in two main stages: primary and secondary endosymbiosis. #### Diagram Explanation: 1. **Primary Endosymbiosis:** - **Phagocytic Eukaryote**: The first image shows a phagocytic eukaryote engulfing a photosynthetic organism. This process is labeled as "Primary endosymbiosis." - **Photosynthetic Eukaryote**: As a result, a photosynthetic eukaryote is formed. This eukaryote is marked with a check mark, indicating it as the correct answer to a question above the diagram. 2. **Secondary Endosymbiosis:** - **Second Phagocytic Eukaryote**: This stage begins with a second phagocytic eukaryote engulfing the photosynthetic eukaryote formed during primary endosymbiosis. - **Chlorarachniophyte**: The final outcome is the chlorarachniophyte, which contains multiple membranes. A yellow star indicates a specific membrane that has originated from the engulfed photosynthetic eukaryote. #### Key Concepts: - **Primary Endosymbiosis** results in the formation of a eukaryote capable of photosynthesis. - **Secondary Endosymbiosis** leads to more complex cellular structures, such as those observed in chlorarachniophytes. This diagram highlights the evolutionary significance of endosymbiotic events in developing cellular complexity.
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