A younger student is trying to push a heavy box down the hallway. They are pushing as hard as they can, but haven’t moved the box. Have they done any work? Why or why not?

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

hope this

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".