After having one concussion you are more likely to have another — some doctorsestimate you increase your risk up to three times. There are two reasons why your risk increases: carelessness and brain chemistry.
Answer: These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.
Hope that helped
I believe hypothesis .
Please vote my answer brainliest. thanks!
There is an uneven distribution of electrons between oxygen & hydrogen atoms
metals (left side of periodic table) become positive ions so calcium would be the answer
