Which one of the following pairs is correctly matched ?

Options

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

Answer

To determine which pair is correctly matched, we need to analyze each option provided in the question.

1. **Parasitism - Intraspecific Relationship**:
- Parasitism refers to a relationship where one organism (the parasite) benefits at the expense of another organism (the host). This relationship occurs between two different species, not within the same species. Therefore, this pair is incorrectly matched.

2. **Uricotelism - Aquatic Habitat**:
- Uricotelism is a method of excreting nitrogenous waste in the form of uric acid. This adaptation is typically found in terrestrial organisms, particularly those that need to conserve water, such as reptiles and birds. Thus, this pair is also incorrectly matched.

3. **Excessive Perspiration - Xeric Adaptation**:
- Xeric adaptations refer to adaptations that allow organisms to survive in dry environments (xeric areas). In such environments, organisms typically reduce perspiration to conserve water. Therefore, excessive perspiration is not a characteristic of xeric adaptation, making this pair incorrectly matched as well.

4. **Streamlined Body - Aquatic Adaptation**:
- A streamlined body shape is a characteristic of many aquatic animals, such as fish. This adaptation helps them move efficiently through water, reducing drag. Therefore, this pair is correctly matched.

Based on the analysis, the correct answer is:
**Streamlined Body - Aquatic Adaptation.**