A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
Clown fish live in anemones, so the eggs being hatched there would the give it a home nearby
Birds-Migratory
Freshwater Fish-local endemic
Large predators-sparse distribution
Comparing DNA
Darwin could compare only the anatomy and embryos of living things. Today, scientists can compare their DNA. Similar DNA sequences are the strongest evidence for evolution from a common ancestor. Look at the diagram in Figure 9.3
