What are four largest major deserts of north america?

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 is the first to receive nutrients that have been absorbed from the digestive tract?

This is a biological reaction due to a stimulus. i need this quickly !