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agnathan
| A member of a jawless class of vertebrates represented today by the lampreys and hagfishes |
amniote
| vertebrate that lay eggs or have amnion; birds, mammals, reptiles |
anthropoid
| primate group made up of humans, apes and most monkeys |
chordate
| an animal that has a notochord, gills slits, post-anal tail, & dorsal nerve tail |
mammalia
| monotremes, marsupials, eutherians |
endothermic
| animals that can keep their body temperature the same |
eutherian mammals
| viviparous, endothermic animals whose young develop within the uterus and are fed via the placenta |
gnathostomes
| jawed vertebrates |
hominid
| humans and other human like creatures that walk upright |
marsupial
| A mammal that rears its young in a pouch |
monotreme
| mammal that lays eggs with a tough, leathery shells instead of giving birth to live young |
multiregional hypothesis
| The concept that Homo erectus migrated to Europe and Asia from Africa and evolved into Homo sapiens |
Neural crest
| Ectoderm derivative that gives rise to peripheral nervous system |
Notochord
| A flexible rod that supports the chordate's back and in most animals is later replaced with a back bone |
operculum
| the covering over gill slits in bony fish |
oviparous
| Referring to a type of development in which young hatch from eggs laid outside the mother's body. |
ovoviviparous
| Referring to a type of development in which young hatch from eggs that are retained in the mother's uterus. |
Placenta
| the link between the mother and the embryo, substances are exchanged here |
Prosimians
| Small, nocturnal primates with large eyes adapted to seeing in the dark. |
Somites
| Mesoderm derivative that gives rise to muscles and the vertebral column |
swim bladder
| stabilizes the fish in different depths of the water |
tetrapod
| member of a group of animals with two sets of paired limbs modified as legs |
tunicates
| Members of the sub phylum Urochordata. |
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