Breanna and Kevin learned that fossil fuels, such as coal and oil, release energy when they are burned. Breanna believes this energy comes from the ancient plants and animals that formed fossil fuels, but Kevin says the energy in fossil fuels comes from the Sun. Explain who is right and why.

The primary bones are characterized by the irregular arrangement of collagen bundles.

Explanation:

Bones are the organ that provides framework and support to the body which is composed of tissue called collagen. The bone which appears first during embryonic development of the living organism is called primary bones.

As primary bones are formed during initial stages, they have irregularly arranged collagen bundles or fibers, which gets modified in later developmental stages.