Identify 'A' as the

question 21

Multiple Choice

Identify 'a' as the

• A) inner membrane.
• B) matrix.
• C) cristae.
• D) intermembrane space.
• E) outer membrane.

---

Definitions:

Bones

The rigid organs that constitute part of the endoskeleton of vertebrates, providing support and protection and enabling movement.

Fins

External appendages on fishes and some other aquatic animals, used primarily for movement, steering, and balance in water.

Jawless Fish

Primitive vertebrates lacking jaws, such as lampreys and hagfish, forming the class Agnatha.

Cartilaginous Skeletons

Skeletons made of cartilage rather than bone, common in sharks, rays, and other elasmobranch fish.