'Cambrian explosion' diaporamas de présentation

Animal Diversity

Animal Diversity. Figure 32.4 A traditional view of animal diversity based on body-plan grades. Figure 32.8 Animal phylogeny based on sequencing of SSU-rRNA. Figure 32.5 Body symmetry. Figure 32.13x Burgess Shale fossils.

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Why Atheism Cannot Be True

Why Atheism Cannot Be True. Robert C. Newman. Atheism Cannot Be True. Because it cannot explain a universe with a beginning. Because it cannot explain the origin and complexity of life. Because it cannot explain Jesus. It cannot explain the universe.

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The Dance of the Fertile Universe

The Dance of the Fertile Universe. Chance and Destiny Embrace. George V. Coyne, S.J. Vatican Observatory. Chance or necessity:. God?. The Universe is Fertile Because It is old: 13.7 billion years It contains 10 thousand billion billion stars . From the Big Bang. Hubble Ultra Deep Field.

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Phylum Annelida

Phylum Annelida. Annelida. Paleontologists believe in the pre-Cambrian era the only animals on Earth were sponges, cnidarians and ancestral bilateral worms.

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Chapter 25 ~ The History of Life on Earth

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An Introduction to Animal Diversity

An Introduction to Animal Diversity. What Is an Animal? An Overview of Animal Phylogeny and Diversity The Origins of Animal Diversity. What Is an Animal?.

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Animal Body Plans

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Abiotic production of biomolecules

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Overview of natural history

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26.1 Invertebrates

26.1 Invertebrates. The First Animals. Choanoflagellate - animal ancestor (single celled). Choano -flagellates formed colonies, may have evolved into sponges (1 st animals). All life was single-celled for over 3 billion years!.

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History of Life on Earth

History of Life on Earth. Getting the Idea. Scientific theories are reliable and well-established explanations of natural phenomena Based on accumulated scientific knowledge Scientific knowledge arises from observation and experimentation

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Solar Brightness Variability and the Evolution of Life on Earth

Solar Brightness Variability and the Evolution of Life on Earth. Tanisha V. Taylor, G. Henry, T. Gary, S.Henry Center of Excellence in Information Systems Tennessee State University April 7, 2004. Objectives. Describe the purpose of the Automatic Photometric Telescopes

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The Cambrian Explosion

The Cambrian Explosion . By Andy Gorman. Cambrian?. In the Cambrian period, the super continent of Pangaea was breaking up into smaller parts Many climate changes took place at this time. Oxygen was increasing Carbon Dioxide was decreasing (this caused the planet to cool down)

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Geologic Timescale

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Biology Warm-Up May 8 , 2014

Biology Warm-Up May 8 , 2014. Phenylketonuria (PKU) is a severe form of mental retardation due to a rare autosomal recessive allele. About 1 in 10,000 newborn Caucasians are affected with the disease. Calculate the frequency of carriers. p + q = 1 p 2 + 2pq + q 2 = 1.

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Journey Through Vertebrate Evolution

Journey Through Vertebrate Evolution. 10 th Grade Living Environment WebQuest Heather Flaxman EDU 505 March 25, 2011. Introduction. Evolution is a core concept to understanding biology, it allows us to better understand the relationships and connections among all disciples of biology.

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Chloe Arwood, Ryan Jun and Yue Wen

Chloe Arwood, Ryan Jun and Yue Wen. Oxygenation and Evolution. Introduction. Early evolution is closely linked to Earth's oxygenation Fossil records reveal important events in evolutionary history Concentrations of certain elements in sedimentary rock are indicative of oxygenation levels

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1) stasis

1) stasis. A) is an essential part of the gradualist model of evolution B) refers to morphological stasis, not molecular stasis C) suggests strong directional selection D) is more likely in dueterostomes E) none of the above. 2) You are:. A) a deuterostome B) a protostome

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The Cambrian Explosion

The Cambrian Explosion. The Big Bang of Life on Earth!. Things to know:. What was it? When was it? Why might it have happened? How loud was it? (joke) What is the Burgess Shale?. The geologic time scale. Two views.

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