Which of the following pairs is correctly matched?

Options

A. Uricotelism - aquatic habitat
B. Parasitism - intra-specific relationship
C. Excessive perspiration - xeric adaptation
D. Stream lined body - aquatic adaptation

Answer

To determine which of the following pairs is correctly matched, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option 1: Eurycotallism - Aquatic Habitat**
- Eurycotallism refers to organisms that can tolerate a wide range of salinity levels. However, these organisms are not specifically associated with aquatic habitats. Instead, they are often found in environments where salinity varies, such as estuaries. Therefore, this pair is **incorrectly matched**.

**Hint:** Think about the definition of eurycotallism and the types of environments these organisms thrive in.

2. **Option 2: Parasitism - Intraspecific Relationship**
- Parasitism is a type of symbiotic relationship where one organism (the parasite) benefits at the expense of another (the host). This relationship is typically interspecific, meaning it occurs between different species, not within the same species (which would be intraspecific). Hence, this pair is also **incorrectly matched**.

**Hint:** Recall the definitions of intraspecific and interspecific relationships to clarify the type of relationship in parasitism.

3. **Option 3: Excessive Perspiration - Zyric Adaptation**
- Xeric adaptations refer to adaptations that help organisms conserve water in dry environments. Excessive perspiration would mean losing more water, which is contrary to the purpose of xeric adaptations. Therefore, this pair is **incorrectly matched**.

**Hint:** Consider what xeric adaptations are meant to achieve in terms of water conservation.

4. **Option 4: Streamlined Body - Aquatic Adaptation**
- A streamlined body shape is indeed an adaptation found in aquatic organisms. This shape reduces drag while swimming, allowing for more efficient movement through water. Thus, this pair is **correctly matched**.

**Hint:** Think about how body shape can influence movement in different environments, particularly in water.

### Conclusion:
The correctly matched pair is **Option 4: Streamlined Body - Aquatic Adaptation**.