Answer: Heavy drinking
Explanation:
Heavy drinking in the college campus increases the chances of the misbehave among students and other people.
There can be risky behavior, such as smoking cigarettes, drugs or having sex with multiple partners.
These behavior gets favored in effect of alcohol. The person is not conscious and can behave in a very bad way to the people around him.
Answer:
was caused by global warming that left ocean animals unable to breathe. The largest extinction in Earth's history marked the end of the Permian period, some 252 million years ago
Explanation:
It was the structure of DNA. Watson and Crick stole the credit from a woman whose name I can't remember, but basically she took really long exposure photographs (24 hours for some) and saw an X shape, which was the corresponding sign of a double helix. It was a pretty complicated method she was using and nobody had thought of using it for DNA research until then.
