A Primary School Science Teacher Decided to Liven Up the Classroom

question 8

Multiple Choice

A primary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater 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 herbivorous gastropod varieties. Lastly, she added some vertebrates-a parrot fish and a clown fish. She arranged for daily feedings of copepods and feeder fish.
The bivalves started to die one-by-one; only the undamaged shells remained. To keep the remaining bivalves alive, the teacher would most likely need to remove the ________.

• A) sea anemones
• B) sea star
• C) gastropods
• D) ectoprocts

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Definitions:

Code Assigned

Refers to specific numerical or alphabetical codes designated for diagnosis, procedures, or other medical classifications in healthcare documentation.

Patent Ductus Arteriosus

A congenital heart defect where a fetal blood vessel doesn't close properly after birth, affecting normal blood flow.

Respiratory Distress Syndrome

A serious condition that affects premature babies, causing breathing difficulties due to underdeveloped lungs.

Premature Infant

An infant born before completing 37 weeks of gestation, often facing potential health challenges due to underdeveloped organs.