Answer:
Explanation:
Bloodletting was proven to prevent illness and is widely used now.
Answer:
Phytoplankton lowers the amount of atmospheric carbon dioxide by absorbing carbon dioxide.
Explanation:
The oceans influence the climate by absorbing and storing carbon dioxide. Plankton influence the exchange of gases between the atmosphere and the sea.
The Ogallala Aquifer is the largest aquifer in the United States.
It occupies an area of 174,000 square miles, spreading across 8 Great Plains States.
Answer:
40%
Explanation:
Remember that guanine always pairs with cytosine, and thymine always pairs with adenine. That means that any time there is a guanine, there is always a cytosine.
If there are 10% guanines, then there are 10% cytosines. That means the total of guanines and cytosines is 20%.
The other 2 bases (thymine and adenine) have to make up the rest of the bases. That means they have to make up 100-20 = 80%.
Again, there will be equal amounts of thymine and adenine, so 80%/2 = 40%.
