Without Genetic Variation, Evolution Cannot Occur

question 69

Multiple Choice

Without genetic variation, evolution cannot occur. Sexual reproduction leads to increased genetic variation, but male bdelloid rotifers have never been observed. Which of the following are correct statements with regard to evolution in bdelloid rotifers?

• A) As we learn more about bdelloid rotifers, we find males in more and more species.
• B) Bdelloid rotifers gain genetic variation by absorbing DNA from the external environment.
• C) Protists infect bdelloids and bring DNA from other rotifers with them.
• D) Bdelloid rotifers have lost the ability to reproduce sexually only recently.

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Definitions:

Rehearsal

A cognitive process involving the conscious repetition of information to be remembered, facilitating its transfer to long-term memory.

Speed-reading

A collection of reading methods that increase the speed and efficiency of reading without greatly reducing comprehension or retention.

Imagination Inflation

The phenomenon where vividly imagining an event can increase confidence that it actually occurred.

Source Amnesia

A memory disorder where an individual is unable to remember the source of a specific memory while retaining the factual content.