Which of the following pairs is correctly matched with respect to the adaptation / mode of nutrition/habitat?

Options

A. Uricotelism-Aquatic habitat
B. Parasitism-Intra -specific relationship
C. Excessive perspiration-Xeric adaptation
D. Stream lined body-Aquatic adaptation

Explanation

To determine which pairs are correctly matched with respect to adaptation, mode of nutrition, or habitat, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Uricotelism**:
- Uricotelism refers to the excretion of uric acid as a waste product.
- It is primarily seen in terrestrial animals such as birds and reptiles (e.g., crocodiles).
- The adaptation of uricotelism is beneficial for conserving water, which is crucial for survival in terrestrial habitats, not aquatic ones.
- **Conclusion**: This option is incorrectly matched.

2. **Analyzing Parasitism**:
- Parasitism is a relationship where one organism (the parasite) benefits at the expense of another organism (the host).
- This relationship occurs between different species, not within the same species, which would be termed intraspecific.
- **Conclusion**: This option is also incorrectly matched.

3. **Excessive Perspiration as Xeric Adaptation**:
- Excessive perspiration is a physiological response to high temperatures and is an adaptation to xeric (dry) environments.
- Sweating helps cool the body through the evaporation of sweat, which is essential in hot climates.
- **Conclusion**: This option is correctly matched.

4. **Streamlined Body as Aquatic Adaptation**:
- A streamlined body shape is an adaptation that reduces resistance while moving through water.
- This adaptation is commonly found in aquatic animals like fish, which helps them swim efficiently.
- Streamlined bodies can also be seen in birds for aerial movement, but primarily it is recognized as an aquatic adaptation.
- **Conclusion**: This option is also correctly matched.

### Final Evaluation:
- The correct pairs are:
- Option 3: Excessive perspiration is an adaptation of xeric environments (correct).
- Option 4: Streamlined body is an aquatic adaptation (correct).

### Summary of Correct Options:
- Options 3 and 4 are correctly matched.