Brain tumor can form in the brain cells (as shown), or it can begin elsewhere and spread to the brain. As the tumor grows, it creates pressure on and changes the function of surrounding brain tissue, which causes signs and symptoms such as headaches, nausea and balance problems.
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Explanation:
Nootropic also known as 'cognitive enhancers' are drugs that some people use in an attempt to improve memory, increase mental alertness and concentration as well as boost energy levels and wakefulness. There are many different nootropics.
Compare and contrast the hominids Australopithecus and homo erectus.
Answer: 1.Metric and 2. Demical
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