pKa of cytosine normally has a value of 4.2 but in hoogsteen triple base pairing this value changes to 

TLS Online TPP Program

#Question id: 18223

#Unit 11. Evolution and Behavior

The origin of indirect evidence of life, no recognizable fossils except bacteria (microfossils) was during which geological eras?

TLS Online TPP Program

#Question id: 18224

#Unit 11. Evolution and Behavior

Proterozoic era characterized by___

a) Origin of life

b) Fossils of blue green algae

c) Most invertebrate evolved

d) First gymnosperm

e) Abundance of marine algae

TLS Online TPP Program

#Question id: 18598

#Unit 11. Evolution and Behavior

First forest plants appeared in which geological period time scale?

TLS Online TPP Program

#Question id: 18597

#Unit 11. Evolution and Behavior

Rapid development of the flowering plant appeared in which geological era?

TLS Online TPP Program

#Question id: 18596

#Unit 11. Evolution and Behavior

First toothed birds appear in which geological time periods?

TLS Online TPP Program

#Question id: 18595

#Unit 11. Evolution and Behavior

Which animal reptiles exist in the Permian periods of Paleozoic era?