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The first vertebrates to live on land were most likely derived from _____.
(Many extant lobe-fins have structures (muscular fins supported by stout bones, lungs) that suggest they were well-suited to colonizing land. Several transitional fossils linking lobe-fins to tetrapods have been discovered.)
Sharks and rays have a flexible skeleton made of cartilage....
fishes includes the sharks, rays, and skates, paired
generally have larger relative brain size than other vertebrates and a relatively long period of parental care
The offspring complete development attached to the mother's nipples, usually inside a pouch or
Many primate characters are arboreal adaptations
Shoulder and hip joints
Grasping hands and feet
Sensitive hands and feet
A short snout and forward-pointing
_____, ______,and ______ have a high degree of social organization
Gorillas, chimpanzees, and humans
Eutherians include _____.
B. duck-billed platypus
D. most of the native mammals of Australia
E. egg-laying mammals
What is the first distinctively hominid trait to appear in the fossil record
upright walkin (bipedaism)
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