Answer:
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.
Since valence shells in nonmetal atoms are almost full, the atoms attract electrons and hold them tightly to fill their valence shells.
We know this because of the discovery of fossils and bones. We can find out roughly when they existed because of carbon dating.
Answer:
they are similar becauze they measure temperature
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