Give one similarity and one difference between protocooperation and mutualism

Explanation

To answer the question about the similarity and difference between protocooperation and mutualism, we can break it down into clear steps:

### Step-by-Step Solution:

1. **Define Mutualism**: Mutualism is a type of symbiotic relationship where both organisms involved benefit from the interaction. This relationship is often obligatory, meaning that the organisms depend on each other for survival.

2. **Example of Mutualism**: A classic example of mutualism is the relationship between lichens, which consist of algae and fungi. In this relationship, algae produce food through photosynthesis, which benefits the fungi, while fungi provide water and nutrients to the algae. This relationship is essential for both organisms.

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