What is parasitism?

Answer

**Step-by-Step Solution:**

1. **Definition of Parasitism**: Parasitism is a biological phenomenon where one organism, known as the parasite, benefits at the expense of another organism, known as the host.

2. **Characteristics of Parasites**: Parasites are typically organisms such as worms, insects, or other entities that live on or in a host organism. They rely on the host for nutrients and other resources necessary for their survival.

3. **Impact on the Host**: In a parasitic relationship, the host experiences a loss. This can manifest as a depletion of nutrients, energy, or overall health. The host does not gain any benefit from the relationship; instead, it suffers negative consequences due to the presence of the parasite.

4. **Example of Parasitism**: A common example of parasitism is the relationship between a tapeworm and a human. The tapeworm resides in the human's intestines and absorbs nutrients from the food the human consumes. This results in the human losing essential nutrients, which can lead to health issues.

5. **Conclusion**: In summary, parasitism is characterized by a one-sided relationship where the parasite benefits while the host suffers, exemplified by organisms like tapeworms that exploit their hosts for survival.

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