What must happen in the "mother" cell before a new cell can be made?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?