Expression of class II molecules by B cells is down-regulated by IFN-¥. 

TLS Online TPP Program

#Id: 1835

#Unit 11. Evolution and Behavior

Triassic- First dinosaurs and mammal

TLS Online TPP Program

#Id: 1836

#Unit 11. Evolution and Behavior

Jurassic- First birds and angiosperms

TLS Online TPP Program

#Id: 1837

#Unit 11. Evolution and Behavior

Cretaceous- Diversity of angiosperms and last dinosaurs extinct 

TLS Online TPP Program

#Id: 1838

#Unit 11. Evolution and Behavior

Paleogene- Radiation of mammals, birds, snakes, angiosperms, pollinating insects

TLS Online TPP Program

#Id: 1839

#Unit 11. Evolution and Behavior

Neogene- Increasingly cool, dry climate; grasslands spread; modern families of mammals and birds; first apes

TLS Online TPP Program

#Id: 1840

#Unit 11. Evolution and Behavior

Quaternary- Extinctions of large mammals, and birds; evolution of Homo sapiens, spread out of Africa