Question

which part of an organism is preserved in cast and mold fossils?

skin
bone
muscle
soft tissue

Explanation:

Analyze fossilization of hard parts

Molds and casts form when an organism is buried in sediment. The soft parts decay rapidly, leaving only the hard parts like shells or bones to make an impression.

Evaluate the options

• Skin, muscle, and soft tissue decay too quickly to leave a reliable mold in typical sedimentary environments.
• Bone (and other hard structures) persists long enough for the surrounding sediment to harden, creating a mold that can later be filled to form a cast.

Answer:

• skin
• bone (Correct answer)
• muscle
• soft tissue