Connections to Evolution of Animals

Evolution through Invertebrates (Porifera to Echinoderms):

Over millions of years subtle mutations build one on another to develop the next orders of species:

1. Porifera

2. Cnideria

3. Platyhelminthes

4. Nematoda

5. Arthropods

6. Mollusks

7. Annelids

8. Echinoderms

Fish to Amphibian:

The evolution was they went from the water they grew legs and are now on land.

Amphibian to Reptile:

They got leathery skin, they were able to still be in water, but also go away from the water.

Reptile to Birds:

Reptile to birds, they grew wings and feathers, they grew beaks and changed internally.

Mammal Connections to Other Classes:

They have a digestive system, skin, weather leathery and/or moist.