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TLS Online TPP Program

#Question id: 4620

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?

#XL - S Microbiology

  1. Forelimb evolution was adaptive in people and bats, but not in whales.

  2. Natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy.

  3. Genes mutate faster in whales than in humans or bats.

  4. Whales are not properly classified as mammals.

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TLS Online TPP Program

#Question id: 4607

#XL - S Microbiology

Members of two different species possess a similar-looking structure that they use in a similar way to perform about the same function. Which of the following would suggest that the relationship more likely represents homology instead of convergent evolution?
TLS Online TPP Program

#Question id: 4607

#XL - T Zoology

Members of two different species possess a similar-looking structure that they use in a similar way to perform about the same function. Which of the following would suggest that the relationship more likely represents homology instead of convergent evolution?
TLS Online TPP Program

#Question id: 4608

#XL - S Microbiology

What must be true of any organ described as vestigial?
TLS Online TPP Program

#Question id: 4608

#XL - T Zoology

What must be true of any organ described as vestigial?
TLS Online TPP Program

#Question id: 4609

#XL - S Microbiology

Pseudogenes are ________.
TLS Online TPP Program

#Question id: 4609

#XL - T Zoology

Pseudogenes are ________.