Use the Following Information to Answer the Next Questions

question 19

Multiple Choice

Use the following information to answer the next questions.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
-In these asexual rotifers, how does variation occur without meiosis and fertilization?

• A) The rotifers have evolved a different mechanism to exchange DNA.
• B) Rotifers must produce haploid spores.
• C) Variation is caused by mutation and maintained by selection.
• D) Some rotifers must selectively lose chromosomes.
• E) Rotifers must live only in specialized environments.