[Campbell Biology P.747] Which of the following mechanisms contributes to the genetic divers... | Practice Question

Which of the following mechanisms contributes to the genetic diversity observed in bdelloid rotifers, despite their asexual reproduction?

  • A: They exchange genetic material through conjugation with other bdelloid species.
  • B: They acquire foreign DNA from the environment through plasma membrane cracks during rehydration.
  • C: They undergo infrequent sexual reproduction cycles that are not yet fully understood.
  • D: Their genomes rapidly accumulate beneficial mutations due to high desiccation tolerance.

Explanation

The text explicitly states, 'When conditions improve and their cells rehydrate, DNA from other species enters their cells through cracks in the plasma membrane. Recent evidence suggests that this foreign DNA can be incorporated into the bdelloids' genome, thereby leading to increased genetic diversity.'