Protect yourself by following these steps: Treat all blood and body fluid spills as if they were infectious. When providing first aid or CPR, protect yourself first, then treat the victim second. Wear appropriate personal protective equipment: gloves, goggles, etc. as required by the accident.
They release carbon dioxide into the atmosphere which in effect create green house gasses
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c is just wrong because that is not how evolution works evolution is a small change in the DNA that takes a long time through many many generations not just as you or an organism get older and smarter you are not evolving
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Why are embryos used in medical research?
Stem cells can be obtained at the early stages of embryo development; these cells are called human embryonic stem cells (hESC). They also could be used in research to develop drugs to treat serious diseases, or to repair organs following a stroke or heart attack.