What was the second great discovery in genetics mentioned in the video? Who made it? What was the time period? What organism was used to make the discovery?

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing