What word is used to describe knowledge about the universe and the method of obtaining that knowledge

What is thought to have caused the mass extinction at the end of the cretaceous period?

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

What is the process of pulling apart an n2 molecule nevermind i got it