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DNA is the molecule that carries all the instructions to make you, you. All life has DNA. You get your DNA from your parents. However, mutations in DNA can occur, which, together with evolution through natural selection is why life can be so varied.The DNA double helix shape represents the two stran...

Serotonin is a chemical neurons (brain cells) use to communicate. Serotonin is how our brain tells us we are happy. Serotonin is also responsible for regulating mood, appetite and sleep.Low levels of serotonin can cause depression, which is why antidepressants can be used to boost serotonin levels...

Neurons are brain (or nerve) cells that process and transmit information through electrical and chemical signals.There are about 100 billion neurons in the human brain. They form a complex web making an estimated 100 trillion connections. It’s because of this complexity we are able to do everythin...

Serotonin is a chemical neurons (brain cells) use to communicate. Serotonin is how our brain tells us we are happy. Serotonin is also responsible for regulating mood, appetite and sleep.Low levels of serotonin can cause depression, which is why antidepressants can be used to boost serotonin levels...

Neurons are brain (or nerve) cells that process and transmit information through electrical and chemical signals.There are about 100 billion neurons in the human brain. They form a complex web making an estimated 100 trillion connections. It’s because of this complexity we are able to do everythin...