The Following Questions Refer to the Paragraph Below

question 16

Multiple Choice

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-If the worms discovered during the autopsies have all features characteristic of their phylum, dissection of the worms should reveal the presence of 1. nephridia.
2) chaetae.
3) segmentation.
4) a gastrovascular cavity.
5) the acoelomate condition.

• A)5 only
• B)1 and 2
• C)4 and 5
• D)1, 2, and 3
• E)3, 4, and 5

Comprehend the pathological conditions associated with the malfunctions in the digestive system.

Identify the roles of various digestive tract layers in health and disease conditions.

Understand the anatomy and functions of the oral cavity and associated structures.

Comprehend the roles of neurotransmitters in the regulation of the digestive process.