Question

1. what is the function of amoebocytes in sponges?

they hold the spicules of the sponge skeleton.
they carry nutrients to other sponge cells and also take away cellular waste.
they sting sponge predators.
they beat their flagella to bring water into the sponge.

Explanation:

• Analyze each option:
• Option 1: The cells that hold spicules are not amoebocytes. Spicules are held by other structural cells, so this is incorrect.
• Option 2: Amoebocytes in sponges are responsible for transporting nutrients to other cells and removing cellular waste. This matches their known function.
• Option 3: Stinging predators is a function of cnidocytes in cnidarians, not amoebocytes in sponges, so this is incorrect.
• Option 4: Beating flagella to bring water in is the function of choanocytes in sponges, not amoebocytes, so this is incorrect.

Answer:

B. They carry nutrients to other sponge cells and also take away cellular waste.