TLS Online TPP Program

#Question id: 8717


Molecular clocks are more reliable when ________.

#XL - S Microbiology
  1. the surrounding pH is close to 7.0
  2. most mutations of highly conserved DNA sequences should have no functional effect
  3. the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
  4. a significant proportion of mutations are not acted upon by natural selection
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TLS Online TPP Program

#Question id: 4630

#XL - S Microbiology

Which pair would have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?

TLS Online TPP Program

#Question id: 4630

#XL - T Zoology

Which pair would have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?

TLS Online TPP Program

#Question id: 4631

#XL - S Microbiology

As a young biologist, Charles Darwin had expected the living plants of temperate South America would resemble those of temperate Europe, but he was surprised to find that they more closely resembled the plants of tropical South America. The biological explanation for this observation is most properly associated with the field of

TLS Online TPP Program

#Question id: 4631

#XL - T Zoology

As a young biologist, Charles Darwin had expected the living plants of temperate South America would resemble those of temperate Europe, but he was surprised to find that they more closely resembled the plants of tropical South America. The biological explanation for this observation is most properly associated with the field of

TLS Online TPP Program

#Question id: 4632

#XL - S Microbiology

Which of these conditions should completely prevent the occurrence of natural selection in a population over time?

TLS Online TPP Program

#Question id: 4633

#XL - S Microbiology

Natural selection is based on all of the following except