An organism in its earliest stage of development
Embryo
The study of body structures
Anatomy
The comparison of body structures and how they vary among species
Comparative anatomy
Animals that have a backbone
Vertebrates
The study of embryos and their development
Embryology
Similarities in the development of embryos that share a common ancestor
Developmental Homology
Phylum that includes fish, amphibians, mammals, and reptiles
Chordates
The shared ancestor of a new, different species that arose from one population
Common ancestor
What animal are bears closely related to?
Seals
Whales are related to what land animals? (name one!)
Hippos, deer, pigs
What class does a mouse belong to?
Mammalia
What class does a chicken belong to?
Aves (birds)
Which body system forms first in chordates?
Nervous system
Why do we study embryology?
To determine common ancestry
What do the gill slits become in mammals?
Pharynx (throat)
Which level of classification is the most specific?
Species
