1.What percentage of the earth is covered by water? ...
2.What sorts of signals does the brain use to communicate sensations, thoughts and actions? ...
3.Did dinosaurs and humans ever exist at the same time? ...
4.What is Darwin's theory of the origin of species?
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1. 71%
Water covers about 71% of the earth's surface. 97% of the earth's water is found in the oceans (too salty for drinking, growing crops, and most industrial uses except cooling)
2.The signals used by the brain to communicate sensations, thoughts, and actions are the electrochemical signals.
3.No! After the dinosaurs died out, nearly 65 million years passed before people appeared on Earth. However, small mammals (including shrew-sized primates) were alive at the time of the dinosaurs.
4.Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
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Answer:
1. 70
2. 3
3. NO
4. I don't know that