Lesson 10 ·Class 9 · Five Kingdom Classification · Sort Lab
Porifera and Cnidaria
The two simplest animal phyla.
Sort each feature into the phylum it belongs to.
Sorted 0/10
All items sorted — check each bin.
VS
Free play — sort every item into the bin it belongs in; each correct drop tells you why. Switch to when you're ready to test yourself.
Sponges have no tissues at all. Cnidarians have two tissue layers and stinging cells — a real step up in complexity.
What this lesson covers
Challenges to clear
- Sort every feature.
- Fill the Cnidaria column — stinging cells and a single opening.
The task
Sort each feature into the phylum it belongs to.
What this lesson covers
- Porifera — Sponges: Body wall pierced by many tiny pores (Water is drawn in through them to bring food and oxygen.); Has no true tissues or organs (Cells work largely independently — the simplest animal body.); Usually asymmetrical in shape (Growth simply follows the surface it is attached to.); Supported by spicules or a fibrous skeleton (A framework of calcium, silica or spongin.); Always fixed and never moves as an adult (Only the larva swims.)
- Cnidaria — Hydra, jellyfish, coral: Bears stinging cells for capturing prey and defence (Cnidoblasts are unique to this phylum.); Has two true tissue layers with a jelly between them (Diploblastic — the first animals with real tissues.); Radially symmetrical (Useful to an animal that meets food from any direction.); Mouth surrounded by a ring of tentacles (They sweep food to the single opening of the body cavity.); Exists as a fixed polyp or a free-swimming medusa (Many alternate between the two forms.)
Hint
Sponges have no tissues at all. Cnidarians have two tissue layers and stinging cells — a real step up in complexity.