An elementary school science teacher decided to liven up theclassroom with a salt-water aquarium. Knowing that salt-wateraquaria can be quite a hassle, the teacher proceeded stepwise.First, the teacher conditioned the water. Next, the teacher decidedto stock the tank with various marine invertebrates, including apolychaete, a siliceous sponge, several bivalves, a shrimp, severalsea anemones of different types, a colonial hydra, a few coralspecies, an ectoproct, a sea star, and several gastropod varieties.Lastly, some vertebrates - a parrotfish and a clownfish - wereadded. She arranged for daily feedings of copepods and feederfish.
The teacher was unaware of the difference between suspensionfeeding and predation. The teacher thought that by providing livecopepods (2 mm long) and feeder fish (2 cm long) the dietary needsof all of the organisms would be satisfied. Consequently, whichtwo organisms would have been among the first to starve todeath (assuming they lack photosynthetic endosymbionts)?
1. sponges
2. coral animals
3. bivalves
4. sea stars
5. shrimp
A) 2 and 5
B) 4 and 5
C) 1 and 3
D) 3 and 4
E) 1 and 2
PLEASE PROVIDE AN EXPLANATION.
An elementary school science teacher decided to liven up theclassroom with a salt-water aquarium. Knowing that salt-wateraquaria can be quite a hassle, the teacher proceeded stepwise.First, the teacher conditioned the water. Next, the teacher decidedto stock the tank with various marine invertebrates, including apolychaete, a siliceous sponge, several bivalves, a shrimp, severalsea anemones of different types, a colonial hydra, a few coralspecies, an ectoproct, a sea star, and several gastropod varieties.Lastly, some vertebrates - a parrotfish and a clownfish - wereadded. She arranged for daily feedings of copepods and feederfish.
The teacher was unaware of the difference between suspensionfeeding and predation. The teacher thought that by providing livecopepods (2 mm long) and feeder fish (2 cm long) the dietary needsof all of the organisms would be satisfied. Consequently, whichtwo organisms would have been among the first to starve todeath (assuming they lack photosynthetic endosymbionts)?
1. sponges
2. coral animals
3. bivalves
4. sea stars
5. shrimp
A) 2 and 5
B) 4 and 5
C) 1 and 3
D) 3 and 4
E) 1 and 2
PLEASE PROVIDE AN EXPLANATION.
