Pinnae are present in

Options

A. Aptenodytes
B. Chameleon
C. Ornithorhynchus
D. Macropus

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Pinnae":**
- The term "pinnae" refers to the external part of the ear, commonly known as the ear pinna or auricle.

2. **Function of Pinnae:**
- The primary function of the ear pinna is to collect sound waves from the environment. It helps in directing these sound waves into the ear canal towards the inner ear.

3. **Presence of Pinnae in Animals:**
- Pinnae are typically found in various groups of animals, including mammals, birds, amphibians, and reptiles.

4. **Identifying the Correct Option:**
- Among the given options, we need to identify which one includes an animal that possesses pinnae.
- The specific example mentioned in the transcript is "Macropus," which is the scientific name for kangaroos, and kangaroos are mammals that have ear pinnae.

5. **Conclusion:**
- Therefore, the correct answer to the question "Pinnae are present in" is option D, which refers to kangaroos (Macropus).

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