Answer:
Mitochondria are organelles whose membranes are specialized for aerobic respiration. The matrix of the mitochondria is the site of Krebs Cycle reactions. The electron transport chain and most ATP synthesis rely on the compartments created by the inner membrane of the mitochondria.
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The fossil evidence found in these sedimentary layers best implies that animals evolved bony skeletons after shells
Explanation:
Fossil is not only describing when organism lived, but it also gives information about the “progression and evolution of life” on this earth over millions of years. Fossils also give information that previous life in earth is different from present life.
According to evolutionist around 500 million years ago complex internal skeleton organism came into existence. They told fish had firstly evolved and they dominated the sea. Fossilization is very rare process.
B. Steroid hormone
This is because most hormones are steroids, that send long distance signaling throughout your body.
