How are the white and black lackses related? who are their common ancestors?

Both the white and black Lacks are all blood related as they have the same family tree. Their common ancestors were: Albert Lacks(Father), Arbert Lacks(Son), Winston Lacks, and Benjamin Lacks. Albert Lacks was a the owner of a plantation. He was a white man who was Henrietta Lack's (a black woman) great-great grandfather. 

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.

answer; 5% is your answer; ///good luck