Question

1. what are tiny needle - like structures, embedded within a sponges mesohyl?

options: cilia, gemmules, spicules, larvae

Explanation:

To solve this, we analyze each option:

• Cilia: Hair - like structures for movement in some cells, not sponge mesohyl structures.
• Gemmules: Reproductive structures in sponges, not needle - like.
• Spicules: Tiny needle - like structures in a sponge's mesohyl, providing support.
• Larvae: Immature forms of organisms, not sponge mesohyl structures.

Answer:

C. spicules