100+ 250 mya PowerPoint (PPT) Presentations, 250 mya PPTs

250 mya - PowerPoint PPT Presentation

Sub Phylum Chelicerata

Sub Phylum Chelicerata. Aquatic Terrestrial. Araneae. Class Arachnida. Class Merostomata. Acari. Ticks, mites. Scorpiones. Class Pycnogonida. Eurypterids 450 to 250 mya (water scorpions) Largest arthropods ever known (largest nearly 3 m)

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303 views • 20 slides

Plate Tectonics

Plate Tectonics. The Shifting Earth. Alfred Wegener (1880-1930). German meteorologist Introduced two important ideas PANGAEA - a supercontinent which began to break up 200 MYA CONTINENTAL DRIFT - as supercontinent broke up it formed smaller continents that drifted apart.

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323 views • 19 slides

Cladogram

Cladogram. More complex. Family tree that branches systematically at points (nodes) representing specific traits possessed by some groups, but not others. Organisms branching to right HAVE this trait. Recent/ derived traits. Organisms branching to left DO NOT have this trait.

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261 views • 2 slides

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'250 mya' diaporamas de présentation

250 mya - PowerPoint PPT Presentation

Sub Phylum Chelicerata

Plate Tectonics

Cladogram