1. Annelid
2. Echinodermata
3. Arthropoda
4. Nemathelminthes
5. Mollusca
Echinodermata
1. Fishes
2. Amphibians
3. Reptiles
4. Mammals
5. Birds
Fishes
1. Aedes aegypti
2. Aedes taeniorhynchus
3. Aedes albopictus
4. Aedes albolineatus
Aedes albopictus
1. Dionosaur
2. Marsupial mammal
3. Eutherian mammal
4. Monotreme mamma
Monotreme mamma
1. Macaca
2. Macropus
3. Ornithorhynuchus
4. Delphimus
Ornithorhynuchus
1. Pinworm
2. Tapeworm
3. Sea anemone
4. Centipede
Sea anemone
1. Nematode
2. Chordate
3. Arthropoda
4. Echinodermata
Nematode
1. External fertilization
2. Internal fertilization
3. Gemmule formation
4. Gametes are formed from epidermal cells
External fertilization
1. Pelvic cavity
2. Pericardial cavity
3. Abdominal cavity
4. Gastrovascular cavity
Gastrovascular cavity
1. Flatworm
2. Geasshopper
3. Lobster
4. Earthworm
Flatworm