Which term is a solid copy of the shape of an organism?

Which term is a solid copy of the shape of an organism?

• A. Mold
• B. Habitat
• C. Cast
• D. Extinct

Answer: (C)

The concept here is how fossils preserve an organism’s shape. A mold creates a hollow impression of the organism, while a cast forms when minerals or sediment fill that hollow space and harden into a solid replica of the original’s shape. So the solid copy of the organism’s shape is the cast. Habitat refers to the environment where it lived, and extinct means no longer living, neither of which describes a solid replica of shape.

The concept here is how fossils preserve an organism’s shape. A mold creates a hollow impression of the organism, while a cast forms when minerals or sediment fill that hollow space and harden into a solid replica of the original’s shape. So the solid copy of the organism’s shape is the cast. Habitat refers to the environment where it lived, and extinct means no longer living, neither of which describes a solid replica of shape.