Geological timeline is the chronological dating of the organisms and the geological happening in the orderly manner of the years and dates. The oldest mammals lived 200 million years ago.
<h3>What are the different species that arrived in the geological timelines?</h3>
5 million years ago humans arrived, 200 million years ago first mammal organism, 1.5 billion years ago complex single-celled organisms and 4.5 billion years ago Earth was formed.
The geological timeline is important as it portrays the presence and arrival of the organisms and the formation of some of the structures.
Therefore, mammals arrived at option B. 200 million years ago.
Learn more about the geological timeline here:
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There was low concentration of salt in the water compared to the cell because when blood cells are put in a hypotonic solution like pure water can cause the cell to swell up and burst due to the little concentration on no concentration
Increased intracranial pressure, brain injury, and drug overdose
Answer:
I believe the answer is B. X-spongy;Y-marrow
Existing landforms are modified by destructive forces, perhaps even eroded away by water, wind, ice, and gravity. Beneath the oceans, volcanic activity forms new seafloor while old seafloor is destroyed at the trenches.