Practice Questions

TLS Online TPP Program

#Question id: 2927

Site-directed mutagenesis of Tyr-15 to Phe in cdc2:

#Unit 2. Cellular Organization

results in the wee mutant phenotype.
results in a phenotype similar to that caused by mutation in cdc25.
increases the possible number of phosphate groups on Cdc2.
prevents binding of Cdc13.

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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?