Answer:
Then humans showed up. Today, the Sahara Desert is defined by undulating sand dunes, unforgiving sun, and oppressive heat. But just 10,000 years ago, it was lush and verdant.
Explanation:
The OPEC oil embargo was an event where the 12 countries that made up OPEC stopped selling oil to the United States. In response to the oil crisis, the United States took steps to become increasingly energy independent.
Answer:
the cells in your heart only i belive
Explanation:
Glucose reaches your red blood cells, and red blood cells are mainly found pumping blood to your heart
Answer:
The change in breastplates and helmets contribute to decline of the Roman Empire by weakening the the military. It weaken them because the removal of it promote laziness and negligence of training and the such. It also removes the protection against ranged weapons which caused many casualties.
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Plants need nitrogen to make proteins I believe
