Examlex
Contraction of smooth muscle in the wall of arterioles is known as ________.
Marsupials
Mammals that carry and nurture their young in a pouch.
Jawless Fishes
A group of fish characterized by their lack of a true jaw, examples include lampreys and hagfishes.
Primitive Vertebrates
Early forms of vertebrates, such as fish and amphibians, that show basic features of the vertebrate lineage and provide insight into evolutionary history.
Cartilaginous Fish
Cartilaginous fish are a class of fishes that have skeletons made entirely out of cartilage, rather than bone, including sharks, rays, and skates.
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