Practice Questions

TLS Online TPP Program

#Question id: 4952

Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which of these questions is currently the most problematic and would have the greatest impact on our understanding if we were able to answer it?

#Unit 11. Evolution and Behavior

How can amino acids, simple sugars, and nucleotides be synthesized abiotically?
How can RNA molecules catalyze reactions?
How did RNA sequences come to carry the code for amino acid sequences?
How could polymers involving lipids and/or proteins form membranes in aqueous environments?

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TLS Online TPP Program

#Question id: 28434

#Unit 5. Developmental Biology

Primitive Streak is homologous to_____

TLS Online TPP Program

#Question id: 28435

#Unit 5. Developmental Biology

Primitive Streak is first arises from which area or cells?

TLS Online TPP Program

#Question id: 28436

#Unit 5. Developmental Biology

Primitive Groove is____

TLS Online TPP Program

#Question id: 28437

#Unit 5. Developmental Biology

Primitive groove is homologous to_____

TLS Online TPP Program

#Question id: 28438

#Unit 5. Developmental Biology

A regional thickening of cells at the anterior end of the primitive streak is termed____

a) Hensen’s node

b) Primitive Knot

c) Primitive Groove

d) Primitive pit

TLS Online TPP Program

#Question id: 28439

#Unit 5. Developmental Biology

Hensen’s node is functionally equivalent to the which structure of amphibian?