Explain how humans are able to produce one type of hemoglobin as they develop in utero, then produce another to use after birth.

Hi K. Try reading Lesson 1.02 in your OLS and the part about genes switching on and off during development. Or try asking me for help instead of strangers on the internet ;)

-Mrs. L

Explanation:

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.