Can you define these definitions?

Behavioral structures == things that the critter does, instinctly, I would guess

-Biological evolution == the slow changes in creatures as their populations grow and are cut by stress. Chimps and humans had common ancestor, one did not come from the other.

-Comparative anatomy == all mammal have the same bones, some stretched or shaped, and sometimes a few are missing.

-Embryonic stages of development == an embryo first looks like a single cell, then a group of cells, goes through a stage where it has gills like a fish, etc

-Evidence for the unit among organisms == got to see you textbook

-Molecular structures == things on a molecular (molecule/atomic) level

-Morphological structures == morph means form, structures that shape the organism.

-Origin of life == How did life start on earth, and how has it changed since then (clue: you need only about 17 amino acids to get a self replicating molecule.

-Phylogenetics =? the genetics of a phylum?

-Recombination of genetic material == the changing of DNA/RNA by exchanging the same between two organisms == in bacteria this shared not sexed.

- Vestigial structure == a piece of the critter that is not really used, but left over from when it was used, example dewclaw in dogs, appendix in humans.

I did not catch them all, but that may help.

Definitions of all such should be found at the end of the chapter or the end of the book or on the net.