Rotifers are characterized by a corona (a ciliated structure used for feeding and movement) and a mastax (a muscular organ used for crushing food). Answer: B Rotifers are relatively large compared to other microscopic organisms, typically ranging from 50 micrometers to over 2 millimeters in length. However, without further context, it is difficult to determine if this is the "best" choice.

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Rotifers Are

Question 57

Multiple Choice

Rotifers are

A) primarily marine.
B) relatively large.
C) characterized by a corona and mastax.
D) characterized by populations dominated by males.
E) not eutelic.

Correct Answer: