Answer:
The first human ancestors appeared between five million and seven million years ago, probably when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago. Then some of them spread from Africa into Asia and Europe after two million years ago.
It starts in the mouth. You start to chew in which the glands that produce saliva make it easier to send down the esophagus
I would diagnose the patient with lassa fever. Lassa fever is an acute viral illness which lasts for 4 weeks. It occurs mostly in west Africa and Sierra leone is found in west Africa. Some of it's symptoms are fever, nausea or vomiting, headache and diarrhea. In severe cases bleeding will occur.
Answer:
the cell membrane becomes depolarized.
Explanation:
Na+ moves in, K+ moves out.
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Answer:
D. Adenine and Thymine form hydrogen bonds, while cytosine and guanine form covalent bonds.
Explanation:
I majored in Biology
