'Permian period' diaporamas de présentation

Reptiles and Birds

2.13k views • 210 slides

Evolution of Cycads, Gymnosperms and Ferns

Evolution of Cycads, Gymnosperms and Ferns . Gymnosperm anatomy - secondary xylem tracheids , circular bordered pits - and fern-like fronds & reproductive dispersal by spores . (no seeds) Arose in Upper Devonian 350 mya --> Pennsylvanian 290 mya All extinct

1.22k views • 37 slides

Evolution of Cycads, Gymnosperms and Ferns

Evolution of Cycads, Gymnosperms and Ferns . Gymnosperm anatomy - secondary xylem tracheids , circular bordered pits - and fern-like fronds & reproductive dispersal by spores . (no seeds) Arose in Upper Devonian 350 mya --> Pennsylvanian 290 mya All extinct

1.75k views • 37 slides

Precambrian Time and the Paleozoic Era

Precambrian Time and the Paleozoic Era. 9.2. Evolution. Evolution: an inheritable change in the characteristics within a population from one generation to the next; the development of new types of organisms from preexisting types of organisms over time

224 views • 16 slides

Chapter 13 Section 2 Paleozoic Era: Life Explodes

Chapter 13 Section 2 Paleozoic Era: Life Explodes. Environmental changes that have affected evolution on Earth: Formation & break up of continents Mountain building Volcanic activity Changes in climate Changes in sea level

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History of Life on Earth

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MAMMALS

MAMMALS. PRODUCED BY: KATHERINE BACA AND NICOLE ANGULO. Mammals. An example of a mammal is a bear, which are members of the class Mammalia . All mammals breath air, have four-chambered hearts, and are endotherms that generate their body heat internally. . Evolution.

360 views • 10 slides

Infinite Space

217 views • 10 slides

Paleozoic Era

Paleozoic Era. By: Sade. What is The Paleozoic Era. The Paleozoic Era is time period hundreds of million years ago. The dinosaurs were alive during the Paleozoic Era. . What Animals Were Alive During The Paleozoic Era. BECAUSE...Shallow seas covered most of the continents...

767 views • 7 slides