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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?

#XL - T Zoology

  1. How can amino acids, simple sugars, and nucleotides be synthesized abiotically?

  2. How can RNA molecules catalyze reactions?

  3. How did RNA sequences come to carry the code for amino acid sequences?

  4. How could polymers involving lipids and/or proteins form membranes in aqueous environments?

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TLS Online TPP Program

#Question id: 4612

#XL - S Microbiology

The greatest number of endemic species is expected in environments that are ________.
TLS Online TPP Program

#Question id: 4612

#XL - T Zoology

The greatest number of endemic species is expected in environments that are ________.
TLS Online TPP Program

#Question id: 4613

#XL - S Microbiology

The questions below refer to the following evolutionary tree, in which the horizontal axis represents time (present time is on the far right) and the vertical axis represents morphological change.  Which species is most closely related to species W?
TLS Online TPP Program

#Question id: 4613

#XL - T Zoology

The questions below refer to the following evolutionary tree, in which the horizontal axis represents time (present time is on the far right) and the vertical axis represents morphological change.  Which species is most closely related to species W?
TLS Online TPP Program

#Question id: 4614

#XL - S Microbiology

Which of these is the extant (that is, living) species most closely related to species X?
TLS Online TPP Program

#Question id: 4614

#XL - T Zoology

Which of these is the extant (that is, living) species most closely related to species X?