Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the group of each animal: Spongilla, a sea anemone, a liver fluke, the filaria worm, a leech, a scorpion, an octopus, a sea urchin.
Porifera: pores, cells only. Coelenterata: one opening, tissues. Platyhelminthes: flat, organs. Nematoda: round. Annelida: segments. Arthropoda: jointed legs, the largest group. Mollusca: soft body, often a shell. Echinodermata: spiny skin, in the sea.
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Without organs. Spongilla: Porifera. Sea anemone: Coelenterata.
Step 2. Worms. Liver fluke: Platyhelminthes. Filaria worm: Nematoda. Leech: Annelida.
Step 3. The rest. Scorpion: Arthropoda. Octopus: Mollusca. Sea urchin: Echinodermata.
Log in to join the discussion.
Loading…