Examlex
____________ contains the respiratory rhythmicity center.
Trilobites
Extinct marine arthropods with a segmented body and calcified exoskeleton, prevalent from the Cambrian to the Permian period.
Cambrian Explosion
The widespread, relatively rapid appearance of diverse types of hard-shelled organisms near the beginning of the Cambrian Period.
Sedimentary Layer
A layer of sediment, typically deposited by water, wind, or ice, that has solidified into rock over geological time.
Fault Scarp
A steep slope or cliff formed as a result of movement along a fault line, representing a visible feature of fault displacement.
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