Describe ten characteristics of Phylum Rotifera, two unique morphological features, and list the classes with their unique characteristics.

1. Ten (10) characteristics of the Phylum Rotifera: i. They are commonly called "wheel bearers." ii. They possess specialized organ systems. iii. They have a complete digestive tract, including both a mouth and an anus. iv. They exhibit uniquely animal characteristics. v. They are microscopic in size. vi. They are found in many freshwater environments. vii. They possess remarkable adaptations to withstand periods of drought and/or cold temperatures. viii. They have the ability to undergo parthenogenesis. ix. They produce resting eggs. x. They have the ability to undergo anhydrobiosis (life without water).

2. Two (2) unique morphological features of Phylum Rotifera: i. Presence of a ciliated corona (wheel organ) at the anterior end, used for feeding and locomotion. ii. Presence of a muscular pharynx called a mastax, which contains hardened jaws known as trophi.

3. Classes in Phylum Rotifera and their unique characteristics:

| Classes | Unique characteristics