Darwin*s Voyage - Miami Beach Senior High School
... around the globe. (Rheas, large flightless birds, live in the grasslands of South America look like ostriches, yet ostriches live only in Africa) Why are there no kangaroos anywhere except in Australia? ...
... around the globe. (Rheas, large flightless birds, live in the grasslands of South America look like ostriches, yet ostriches live only in Africa) Why are there no kangaroos anywhere except in Australia? ...
Chap. 15 Evolution Notes - Fort Thomas Independent Schools
... similar phenotypes even though the ancestors were quite different. Ex. Sharks and porpoises 3. Divergent Evolution – 2 or more related populations become more and more dissimilar. Caused by a change of habitat. --- usually results in new species a. Adaptive Radiation – related species evolve from si ...
... similar phenotypes even though the ancestors were quite different. Ex. Sharks and porpoises 3. Divergent Evolution – 2 or more related populations become more and more dissimilar. Caused by a change of habitat. --- usually results in new species a. Adaptive Radiation – related species evolve from si ...
Early History Of Life and Animal Origins
... • Genetic “clocks” indicate first animals evolved about 1,000 Mybp • Fossils show only very simple designs until Cambrian Period, 540 Mybp • ”Suddenly,” nearly every existing phylum and several extinct ones have diverse Cambrian fossils – Probably over fewer than 10 My ...
... • Genetic “clocks” indicate first animals evolved about 1,000 Mybp • Fossils show only very simple designs until Cambrian Period, 540 Mybp • ”Suddenly,” nearly every existing phylum and several extinct ones have diverse Cambrian fossils – Probably over fewer than 10 My ...
Fossil Record - hrsbstaff.ednet.ns.ca
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
Slides 12
... Modification of existing structures for new purposes: ears and feathers Feathers: for display or warmth before flight? Late Jurassic feathered dinosaur Fig. 34.31. Bones of inner ear of modern mammals are derived from jaw joint of ancestors (see also Fig. ...
... Modification of existing structures for new purposes: ears and feathers Feathers: for display or warmth before flight? Late Jurassic feathered dinosaur Fig. 34.31. Bones of inner ear of modern mammals are derived from jaw joint of ancestors (see also Fig. ...
Section 7-1
... similar traits to those on mainland – Traits seemed to match environment – Iguanas on mainland were green (match jungle) and grey on islands (match rocks) ...
... similar traits to those on mainland – Traits seemed to match environment – Iguanas on mainland were green (match jungle) and grey on islands (match rocks) ...
Fossil Record
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
Descent with Modification: Darwinism
... Similarity in structure based on adaptation for same function, but not common descent Convergent evolution, independent evolution of similar features ...
... Similarity in structure based on adaptation for same function, but not common descent Convergent evolution, independent evolution of similar features ...
Fossil Record - Coventry Local Schools
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
Evolution - Richard Dawkins Foundation
... supported by multiple forms of evidence. III. Natural Selection is a primary mechanism leading to change over time in organisms. ...
... supported by multiple forms of evidence. III. Natural Selection is a primary mechanism leading to change over time in organisms. ...
Fossil Record - Helena High School
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
Punctuated Equilibrium vs Gradualism in the Fossil Record File
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
Examining the Fossil Record
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
... The age and morphologies (appearances) of fossils can be used to place fossils in sequences that often show patterns of changes that have occurred over time. This relationship can be depicted in an evolutionary tree, also known as a phylogenetic tree. There are two major hypotheses on how evolution ...
Evolution
... 4. similarities in early development, or embryology. 5. molecular (DNA) homologies ...
... 4. similarities in early development, or embryology. 5. molecular (DNA) homologies ...
Natural Selection and the Evidence of Evolution
... Fossil Evidence • Indirect source • Provide record of early life based upon rock layers and location of fossils within them. • As record becomes more complete, the sequence of evolution is clearer ...
... Fossil Evidence • Indirect source • Provide record of early life based upon rock layers and location of fossils within them. • As record becomes more complete, the sequence of evolution is clearer ...
evolution - Richard Dawkins Foundation
... I. The scientific theory of evolution is the organizing principle of life science. II. The scientific theory of evolution is supported by multiple forms of evidence. III. Natural Selection is a primary mechanism leading to change over time in organisms. ...
... I. The scientific theory of evolution is the organizing principle of life science. II. The scientific theory of evolution is supported by multiple forms of evidence. III. Natural Selection is a primary mechanism leading to change over time in organisms. ...
History of Evolutionary Thought (student note)
... would pass on those traits to their offspring - competition for limited resources between individuals of the same species would select for individuals with favourable traits - “survival of the fittest” ...
... would pass on those traits to their offspring - competition for limited resources between individuals of the same species would select for individuals with favourable traits - “survival of the fittest” ...
Selective Breeding – the purposeful breeding of plants and animals
... over time, that leads to the development of new species. Competition – struggle for survival between members of the same species, as well as between different species. Homologous Structures – similar body structures that related species inherited from a common ancestor. Examples include the flipper ...
... over time, that leads to the development of new species. Competition – struggle for survival between members of the same species, as well as between different species. Homologous Structures – similar body structures that related species inherited from a common ancestor. Examples include the flipper ...
Transitional fossil
A transitional fossil is any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group. This is especially important where the descendant group is sharply differentiated by gross anatomy and mode of living from the ancestral group. These fossils serve as a reminder that taxonomic divisions are human constructs that have been imposed in hindsight on a continuum of variation. Because of the incompleteness of the fossil record, there is usually no way to know exactly how close a transitional fossil is to the point of divergence. Therefore, it cannot be assumed that transitional fossils are direct ancestors of more recent groups, though they are frequently used as models for such ancestors.In 1859, when Charles Darwin's On the Origin of Species was first published, the fossil record was poorly known. Darwin described the perceived lack of transitional fossils as, ""...the most obvious and gravest objection which can be urged against my theory,"" but explained it by relating it to the extreme imperfection of the geological record. He noted the limited collections available at that time, but described the available information as showing patterns that followed from his theory of descent with modification through natural selection. Indeed, Archaeopteryx was discovered just two years later, in 1861, and represents a classic transitional form between dinosaurs and birds. Many more transitional fossils have been discovered since then, and there is now abundant evidence of how all classes of vertebrates are related, much of it in the form of transitional fossils. Specific examples include humans and other primates, tetrapods and fish, and birds and dinosaurs.The term ""missing link"" has been used extensively in popular writings on human evolution to refer to a perceived gap in the hominid evolutionary record. It is most commonly used to refer to any new transitional fossil finds. Scientists, however, do not use the term, as it refers to a pre-evolutionary view of nature.