Gonapophysis are

• A. Mouth Parts
• B. Plates bearing spiracles
• C. Joints between sclera
• D. External genitalia

Gonapophysis refers to specific structures found in certain insects. They are primarily associated with the reproductive system.

Identifying Gonapophysis

To clarify the options provided:

• A. Mouth Parts: These are not gonapophysis; they are involved in feeding.
• B. Plates bearing spiracles: Spiracles are openings for breathing, not gonapophysis.
• C. Joints between sclera: This option relates to eye anatomy, not gonapophysis.
• D. External genitalia: This is the correct answer, as gonapophysis are indeed part of the external reproductive structures in some insects.

Conclusion

In summary, the correct choice is D. External genitalia, as gonapophysis play a role in the reproductive anatomy of certain insects.