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QveST [7]
3 years ago
10

How is modern earth different from earth over 4 billion years ago?

Biology
1 answer:
igor_vitrenko [27]3 years ago
5 0

Earth and its atmosphere are continuously altered. Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4 billion years ago.

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Write on urea cycle​
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These reactions are collectively called the urea cycle or the Krebs-Henseleit cycle. Ammonia is a toxic product of nitrogen metabolism which should be removed from our body. The urea cycle or ornithine cycle converts excess ammonia into urea in the mitochondria of liver cells.

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During the Berlin Conference, who was granted control of the Congo Free State?
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leopold

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3 years ago
What step in photosynthesis may occur during day and night? A.Light independant reactions B.Light dependant reactions c. Photoly
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You drove through Iowa in the spring and noticed that along a stretch of several kilometers, every third fence post had a male r
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