Here's why:
* Gemmules: These are specialized structures produced by sponges during unfavorable conditions. They contain an aggregation of amoebocytes (specialized cells) and are surrounded by a tough, protective coat.
* Asexual Reproduction: When conditions improve, the gemmule's coat breaks down, and the amoebocytes inside develop into a new sponge. This process is a form of asexual reproduction as it involves only one parent and does not involve the fusion of gametes.
So, gemmule formation is a unique adaptation for survival in sponges, allowing them to reproduce asexually and survive harsh conditions.
