Humans are thought to have evolved during the era. a. cenozoic c. mesozoic b. paleozoic d. precambrian

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.

What organ systems are working to you cool down after a workout?

Which direction does the energy flow in this energy pyramid ?