Examlex
This diagram shows that two oxygen atoms interact
Shark
A group of elasmobranch fish characterized by their cartilaginous skeletons, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head.
Tuna
A species of saltwater fish that belongs to the tribe Thunnini, a subgrouping of the mackerel family.
Extant Mammal Groups
Currently living mammalian groups, such as marsupials, rodents, and primates, that have differentiated into distinct species through evolution.
Dinosaurs
A diverse group of reptiles of the clade Dinosauria that first appeared during the Mesozoic Era.
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