Which achievement allowed the middle kingdom to enjoy great prosperity ?

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?