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Evolutionary uniformitarianism
Evolutionary uniformitarianism

... simply due to extinction of once-intermediate forms. The exploration of morphologies through a morphospace has not been random, but has been guided to greater or lesser extent by selection. Consequently, large regions of morphospace may never have been sampled by evolution (Thomas and Reif, 1991; Th ...
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File

... includes all the sub-groups that are not exclusively parasitic. There are about 4,500 species, which range from 1 mm long to large freshwater forms more than 500 mm (20 in) long.. Platyhelminthes are bilaterally symmetrical animals, in other words their left and right sides are mirror images of each ...
Title Page Photo “Come forth into the light of things, —William Wordsworth
Title Page Photo “Come forth into the light of things, —William Wordsworth

... Must have specific chemical composition, regardless of where it’s found • Atoms arranged in a regular pattern to form solid crystals ...
3. Caledonian Orogenesis
3. Caledonian Orogenesis

... Made up of almost entirely of grains of quartz, which are cemented tightly together to form a very hard rock. These rocks are broken into loose, angular blocks forming scree slopes. The lower layers (oldest) show cross-bedding and fossilised symmetrical ripples. The upper (younger) layers contain ve ...
PowerPoint
PowerPoint

... cope with the environment became larger and stronger, while those not used deteriorated. ...
Decent With Modification Darwin`s Theory
Decent With Modification Darwin`s Theory

... Fossil Record - The fossil record contains missing links between present species and their ancestors . . . sort of . . . maybe Comparative Anatomy - Homologous (similar) structures must have evolved from the same ancestral structure . . . Except when we don’t think two organisms shared a common ance ...
Chapter 9: Evolution
Chapter 9: Evolution

... 1. The Miller-Urey experiment demonstrated that complex molecules can spontaneously form from simple chemicals. 2. Later experiments showed that simple precursors spontaneously form polymers to form proteins, DNA and RNA when put into contact with hot sand, clay or rock ...
AP Biology Survey of the Kingdoms CHAPTER 27 – Bacteria and
AP Biology Survey of the Kingdoms CHAPTER 27 – Bacteria and

... _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ 8. What is a capsule and what advant ...
FUNGI
FUNGI

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Concepts of Biology - Amazon Simple Storage Service (S3)
Concepts of Biology - Amazon Simple Storage Service (S3)

... system and the body wall. It houses organs such as the kidneys and spleen, and contains the circulatory system. Triploblasts that do not develop a coelom are called acoelomates, and their mesoderm region is completely filled with tissue, although they have a gut cavity. Examples of acoelomates inclu ...
General Characteristics
General Characteristics

... includes all the sub-groups that are not exclusively parasitic. There are about 4,500 species, which range from 1 mm long to large freshwater forms more than 500 mm (20 in) long.. Platyhelminthes are bilaterally symmetrical animals, in other words their left and right sides are mirror images of each ...
15 | diversity of animals
15 | diversity of animals

... system and the body wall. It houses organs such as the kidneys and spleen, and contains the circulatory system. Triploblasts that do not develop a coelom are called acoelomates, and their mesoderm region is completely filled with tissue, although they have a gut cavity. Examples of acoelomates inclu ...
study guide questions 3rd nine weeks 2017
study guide questions 3rd nine weeks 2017

... Contrast primary waves with secondary waves. Which one arrives first? Explain the Laws (rule) of superposition and crosscut. What type of dating does this describe? Describe 3 ways in which fossils form. Which one is most common? Describe what limestone is and how does it form Explain what the fall ...
Changes in the Earth and its Atmosphere
Changes in the Earth and its Atmosphere

... * from the atmosphere accept from the air or condensed water (vapour) (1) was pulled by gravity into depressions (1) or idea of impervious sea bed or from comets (which crashed on the Earth) (1) ice (from these) melted (1) ...
Evolution-Fitness and Rocks
Evolution-Fitness and Rocks

... Fossil Record - The fossil record contains missing links between present species and their ancestors . . . sort of . . . maybe Comparative Anatomy - Homologous (similar) structures must have evolved from the same ancestral structure . . . Except when we don’t think two organisms shared a common ance ...
earthquake - Westmoreland Central School
earthquake - Westmoreland Central School

... – Plates slide horizontally past one another – Tension builds as plates slide and when tension is released earthquakes occur. • San Andreas Fault is an example ...
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File

... occurred and explains the huge diversity of living things.  Evolution is a scientific theory, it is predictive and testable. Microevolution has been observed in many species. The fossil record shows how species have evolved. Genetic relationships and differences are a clear indication of the evolut ...
Earth Science Final Exam Study Guide
Earth Science Final Exam Study Guide

... 4. Know ways to reduce your impact on the climate. 5. Understand the greenhouse effect. 6. Know the water cycle---transpiration too! 7. Know alternative energy to fossil fuels. 8. Explain the carbon footprint made by countries in relation to their wealth. 9. Know the greenhouse gases, and what are n ...
Evolution PPT2
Evolution PPT2

... Darwin saw fossils as a record of the history of life on Earth. By comparing fossils from older rock layers with fossils from younger layers, scientists could document that life on Earth has changed over time. ...
Continents change position over time.
Continents change position over time.

... Wegener learned that the fossils of an ancient reptile, Mesosaurus (MEHZ-uh-SAWR-uhs), had been discovered in South America and western Africa. This small reptile lived about 270 million years ago. Its fossils were not found anywhere else in the world. Wegener said this fact could easily be explaine ...
No Slide Title
No Slide Title

... were permanent & unchanging. – Scientific understanding of evolution began to develop in the 17th and 18th centuries as geologists and naturalists compared geologic processes and living and fossil organisms around the world. ...
Earth and Atmosphere
Earth and Atmosphere

... All of these are involved in a continuous flow of rock from the surface underground only to emerge again later as part of the on-going rock cycle. ...
Chemical energy - Columbusisd.org
Chemical energy - Columbusisd.org

... Theme: The Continuity of Life Is Based on Heritable Information in the Form of DNA • Chromosomes contain most of a cell’s genetic material in the form of DNA (deoxyribonucleic acid) • DNA is the substance of genes • Genes are the units of inheritance that transmit information from parents to offspr ...
Biology lecture # 1 Levels of Life (From Atom to Biosphere)
Biology lecture # 1 Levels of Life (From Atom to Biosphere)

... All the living organisms consist of cells. Cells are called the basic units of life. Cells are specialized in their structure and functions. There are different types of cells present in the bodies of multicellular organisms. But some organisms like amoeba consist of only one cell. Cells are categor ...
PlateInteractions1
PlateInteractions1

... 1. What is the name of the plate that we live on? 2. About where on the plate is New York City (on ...
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Evolutionary history of life



The evolutionary history of life on Earth traces the processes by which living and fossil organisms have evolved since life appeared on the planet, until the present day. Earth formed about 4.5 Ga (billion years ago) and life appeared on its surface within 1 billion years. The similarities between all present-day organisms indicate the presence of a common ancestor from which all known species have diverged through the process of evolution. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
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