B because the temperature goes up then the birds would move to the south were it is cooler.
The main portion of the cell is called the soma or cell body. It contains the nucleus, which in turn contains the genetic material in the form of chromosomes. Neurons have a large number of extensions called dendrites.
Bacteria can convert nitrogen in the air into a form plants can use
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The model appears to show the carbon dioxide molecules entering the blood cell and the oxygen molecules existing the cell.
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Scientists have found fossils of whales and other marine animals in ... When these animals died from 15 million to 20 million years ago, their ... In geological terms, the time the fossils took to rise from ocean floor to mountain top was ... In more recent sediments, the group found species related to modern .
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