Natural Selection is this.
Process by which organisms become better adapted to their environment and are able to survive and produce more offspring
Jawless fish have a skeleton made up of this.
Cartilage
Jawless and Cartilaginous fish skeletons are made up of this.
Cartilage
This is a diagram that depicts the lines of evolutionary decent.
phylogenetic tree
The 5 main stages of a Salmon's life cycle.
Egg, Alevin, Fry, Smolt, Adult
Famous movie from the 70's where the shark is the antagonist.
Jaws
Dory in finding nemo is this kind of fish.
Blue Tang
The 6th level of classification.
Family
Most fish have this organ that allows them to control their depth in the water.
Swim bladder
Ariel's sidekick in The Little Mermaid is this kind of fish.
Flounder
A node, or where two+ lineages branch off, on a phylogenetic tree represents this.
Last common ancestor
Sharks lack a swim bladder, so they have an abundance of oil in this organ.
Liver
Angler fish are a type of fish that glow. This term is called this.
Bioluminsecence
The man that is well known for being one of the first people to theorize evolutionary theory. Part of his research included finches.
Charles Darwin
Salmon travel upstream from the sea to freshwater produce their offspring. The term for this is this.
Anadromous