Question

station #2: skeleton comparison

1. view each image in the microscope. label each image as either spicules or spongin
2. spicules are made of
3. spongin is made of
4. how is the artificial sponge different from the real sponges?

Explanation:

1. The first image with a star - shaped structure is spicules. The second image with a mesh - like structure is spongin.
2. Spicules are made of calcium carbonate or silica.
3. Spongin is made of a collagen - like protein.
4. Artificial sponges are usually made of synthetic materials like polyurethane, while real sponges are living organisms with a complex cellular structure and natural skeletal components (spicules and spongin).

Answer:

1. Left: Spicules; Right: Spongin
2. Calcium carbonate or silica
3. A collagen - like protein
4. Artificial sponges are made of synthetic materials, real sponges are living organisms with natural skeletal components.