Question: If an apple snail is placed in this device, over the long term, which change is most likely to occur to its shell?
A. The shell will thicken more rapidly due to mineral intake.
B. A layer of green algae will quickly adhere to the shell surface.
C. The shell’s color will turn a bright blue.
D. The shell will gradually be eroded and become thinner.
Clues:
1. The water in the tank has a yellowish-brown tint.
2. There are pieces of driftwood within the aquarium.
3. There are dried leaves on the substrate at the bottom of the tank.
Answer: D
Category: Physics