NEET BIOLOGY

Detailed explanation-1: -All adult sponges are sessile, meaning they live permanently attached to rocks or other submerged objects and do not move about on their own. Some sponges grow in thin encrusting layers over surfaces (Fig. 3.18 A).

Detailed explanation-2: -Sponges are sessile, meaning they cannot move, they filter water to obtain their food. They don’t have brains, stomachs, or other organs. They do not even have true tissues. Instead, their bodies are made up of specialized cells (cell-level organization) that do specific jobs.

Detailed explanation-3: -Sea sponges are sessile, which means they are anchored in place for the entirety of their lives and do not move around.

Detailed explanation-4: -Spongilla have a leuconoid body form with a skeleton composed of siliceous spicules. They are sessile organisms, attaching themselves to hard substrate like rocks, logs and sometimes to ground.