Which of the following statement is incorrect about birds ?

Options

A. The two clavicles and one interclavicle forms a V-shaped bone called as furcula.
B. The eyes of birds are peculiar due to the presence of pecten.
C. Carinatae of flying birds have sternum with keel.
D. In birds the left ovary and oviduct is atrophied.

Answer

To determine which statement about birds is incorrect, let's analyze each option step by step:

1. **Option A**: "The two clavicles and one interclavicle forms a v-shaped bone called furcula."
- Birds have two clavicles (collar bones) and one interclavicle that together form a structure known as the furcula or wishbone. This statement is correct.

2. **Option B**: "The eyes of birds are peculiar due to the presence of pectin."
- The eyes of birds contain a structure called pectin (or pecten), which is thought to help with vision. This statement is also correct.

3. **Option C**: "Carinatia of flying birds have sternum with keel."
- Flying birds (Carinatae) possess a sternum with a keel, which is an extension that provides an attachment for powerful flight muscles. This statement is correct as well.

4. **Option D**: "In birds, the left ovary and oviduct is atrophoid."
- In birds, typically, the right ovary and oviduct are atrophied (non-functional), while the left ovary and oviduct are functional. Therefore, this statement is incorrect.

Based on the analysis, the incorrect statement about birds is **Option D**: "In birds, the left ovary and oviduct is atrophoid."