Bdelloid rotifers are microscopic freshwater invertebrates. No one has ever seen a male. Thus researchers hypothesized that this species reproduces solely by asexual means. What evidence supports this hypothesis?
A. Bdelloid rotifers exhibit much more variation in their pairs of homologous genes than most sexually reproducing species.
B. Males cannot be distinguished from females.
C. Because of the evolutionary disadvantage of asexual vs. sexual reproduction, bdelloid rotifers are in danger of extinction.
D. Over time, bdelloid rotifers have increased their chromosome number.
A. Bdelloid rotifers exhibit much more variation in their pairs of homologous genes than most sexually reproducing species.
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