Dos diferencias culturales de mexico y Haití

Why are fossils of organism's from the phanerozoic eon much more likely to be found than fossils of organisms from any other eon? a. more organisms present during the phanerozoic eon had soft body parts. b. organisms present during the phanerozoic eon were all microscopic. c. more organisms present during the phanerozoic eon had hard body parts. d. organisms present during the phanerozoic eon are the most ancient life forms.

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer