Slide 1 - swofford8
... accounts for the diversity of species developed through gradual processes over many generations. • Species acquire many of their unique characteristics through biological adaptation, which involves the selection of naturally occurring variations in populations ...
... accounts for the diversity of species developed through gradual processes over many generations. • Species acquire many of their unique characteristics through biological adaptation, which involves the selection of naturally occurring variations in populations ...
15.2 Evidence of Evolution I. Support for Evolution
... Support for Evolution - theory of evolution states that all organisms on Earth have descended from a common ancestor a. The fossil record i. Fossils provide evidence of evolution ii. Ancient species share similarities with current species iii. Fossil record important for determining ancestry of orga ...
... Support for Evolution - theory of evolution states that all organisms on Earth have descended from a common ancestor a. The fossil record i. Fossils provide evidence of evolution ii. Ancient species share similarities with current species iii. Fossil record important for determining ancestry of orga ...
Evolution Jeopardy Review Game
... These are structures that are non functional in a present day organism, that were once functional in an ancestor. ...
... These are structures that are non functional in a present day organism, that were once functional in an ancestor. ...
15.3 Evolution by Natural Selection
... 1) VARIATION: There is _____________________within a population. (variation = some individual differences) Some variations are _____________________than others (they are adaptations that increase fitness). 2) SELECTION: The most ____________organisms survive and reproduce. They are ___________ by ...
... 1) VARIATION: There is _____________________within a population. (variation = some individual differences) Some variations are _____________________than others (they are adaptations that increase fitness). 2) SELECTION: The most ____________organisms survive and reproduce. They are ___________ by ...
Descent with Modification
... organisms with different structures Today’s species look different from their ancestors Each species descended with changes over time ...
... organisms with different structures Today’s species look different from their ancestors Each species descended with changes over time ...
Changes Over Time and Classification
... In Darwin’s travels aboard the HMS Beagle, which began in 1831, Charles Darwin made three important observations: The world includes a tremendous diversity of living things throughout a wide range of habitats Animal species, like those in the Galapagos Islands, that are related, can have different c ...
... In Darwin’s travels aboard the HMS Beagle, which began in 1831, Charles Darwin made three important observations: The world includes a tremendous diversity of living things throughout a wide range of habitats Animal species, like those in the Galapagos Islands, that are related, can have different c ...
Natural selection
... leads to a gradual change in a population Evolution is a gradual change in a population over many ...
... leads to a gradual change in a population Evolution is a gradual change in a population over many ...
Evolution Jeopardy
... These are structures that are non functional in a present day organism, that were once functional in an ancestor. ...
... These are structures that are non functional in a present day organism, that were once functional in an ancestor. ...
File
... time, the findings stunned him, and he was disturbed by them He did not publish it until 25 years after his findings ...
... time, the findings stunned him, and he was disturbed by them He did not publish it until 25 years after his findings ...
Evolution Notes #4
... between organisms for space, food, water, light, minerals, and other limited resources ...
... between organisms for space, food, water, light, minerals, and other limited resources ...
Evolution - sciencebruemmer
... How do you think a biologist would explain the cheetah’s speed, based on the fact that their ancestors (and all other cats) only run 35 mph Remember, you are trying to think of a way that all cheetahs got faster over time ...
... How do you think a biologist would explain the cheetah’s speed, based on the fact that their ancestors (and all other cats) only run 35 mph Remember, you are trying to think of a way that all cheetahs got faster over time ...
Nothing in biology makes sense except in the light of evolution.
... •Evolution is the central theme of biology. Adaptation is a universal characteristic of living things. •More than any other idea in biology, evolutionary theory serves to tie the discipline together. •If you look at any organism critically, you are first struck by the differences from other organism ...
... •Evolution is the central theme of biology. Adaptation is a universal characteristic of living things. •More than any other idea in biology, evolutionary theory serves to tie the discipline together. •If you look at any organism critically, you are first struck by the differences from other organism ...
Evidence of Evolution
... •Evolution is the central theme of biology. Adaptation is a universal characteristic of living things. •More than any other idea in biology, evolutionary theory serves to tie the discipline together. •If you look at any organism critically, you are first struck by the differences from other organism ...
... •Evolution is the central theme of biology. Adaptation is a universal characteristic of living things. •More than any other idea in biology, evolutionary theory serves to tie the discipline together. •If you look at any organism critically, you are first struck by the differences from other organism ...
Evolutionary Theory (1)
... Darwin published “On the Origin of Species” in 1859, which challenged the root of Western culture ...
... Darwin published “On the Origin of Species” in 1859, which challenged the root of Western culture ...
adaptation: genetically determined characteristic (behavioral
... natural selection: differential reproduction and survival of individuals that results in elimination of maladaptive traits from a population. In other words, differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment. Evolution ...
... natural selection: differential reproduction and survival of individuals that results in elimination of maladaptive traits from a population. In other words, differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment. Evolution ...
REVIEW UNIT 6: EVOLUTION
... 5. Which of the following principles is NOT part of Darwin’s theory of evolution by natural selection? (1999:53) a. Evolution is a gradual process that occurs over long periods of time. b. Variation occurs among individuals in a population. c. Mutations are the ultimate source of genetic variation d ...
... 5. Which of the following principles is NOT part of Darwin’s theory of evolution by natural selection? (1999:53) a. Evolution is a gradual process that occurs over long periods of time. b. Variation occurs among individuals in a population. c. Mutations are the ultimate source of genetic variation d ...
practice questions
... a. experimentation with animals. b. observations of many species and their geographical locations. c. reading the writings of Wallace. d. agreeing with Lamarck about the driving force behind evolution. 4. One scientist who attempted to explain how rock layers form and change over time was a. Thomas ...
... a. experimentation with animals. b. observations of many species and their geographical locations. c. reading the writings of Wallace. d. agreeing with Lamarck about the driving force behind evolution. 4. One scientist who attempted to explain how rock layers form and change over time was a. Thomas ...
16-2 The Process of Speciation
... Eastern and Western meadowlarks have different songs Separation by geographic barriers : rivers or mountains Natural selection works separately on each group ...
... Eastern and Western meadowlarks have different songs Separation by geographic barriers : rivers or mountains Natural selection works separately on each group ...
What was Darwin`s explanation for evolution?
... Movie: Elements of biology: agents of evolution ...
... Movie: Elements of biology: agents of evolution ...
What was Darwin`s explanation for evolution?
... Movie: Elements of biology: agents of evolution ...
... Movie: Elements of biology: agents of evolution ...
Evolution
Evolution is change in the heritable traits of biological populations over successive generations. Evolutionary processes give rise to diversity at every level of biological organisation, including the levels of species, individual organisms, and molecules.All of life on earth shares a common ancestor known as the last universal ancestor, which lived approximately 3.5–3.8 billion years ago. Repeated formation of new species (speciation), change within species (anagenesis), and loss of species (extinction) throughout the evolutionary history of life on Earth are demonstrated by shared sets of morphological and biochemical traits, including shared DNA sequences. These shared traits are more similar among species that share a more recent common ancestor, and can be used to reconstruct a biological ""tree of life"" based on evolutionary relationships (phylogenetics), using both existing species and fossils. The fossil record includes a progression from early biogenic graphite, to microbial mat fossils, to fossilized multicellular organisms. Existing patterns of biodiversity have been shaped both by speciation and by extinction. More than 99 percent of all species that ever lived on Earth are estimated to be extinct. Estimates of Earth's current species range from 10 to 14 million, of which about 1.2 million have been documented.In the mid-19th century, Charles Darwin formulated the scientific theory of evolution by natural selection, published in his book On the Origin of Species (1859). Evolution by natural selection is a process demonstrated by the observation that more offspring are produced than can possibly survive, along with three facts about populations: 1) traits vary among individuals with respect to morphology, physiology, and behaviour (phenotypic variation), 2) different traits confer different rates of survival and reproduction (differential fitness), and 3) traits can be passed from generation to generation (heritability of fitness). Thus, in successive generations members of a population are replaced by progeny of parents better adapted to survive and reproduce in the biophysical environment in which natural selection takes place. This teleonomy is the quality whereby the process of natural selection creates and preserves traits that are seemingly fitted for the functional roles they perform. Natural selection is the only known cause of adaptation but not the only known cause of evolution. Other, nonadaptive causes of microevolution include mutation and genetic drift.In the early 20th century the modern evolutionary synthesis integrated classical genetics with Darwin's theory of evolution by natural selection through the discipline of population genetics. The importance of natural selection as a cause of evolution was accepted into other branches of biology. Moreover, previously held notions about evolution, such as orthogenesis, evolutionism, and other beliefs about innate ""progress"" within the largest-scale trends in evolution, became obsolete scientific theories. Scientists continue to study various aspects of evolutionary biology by forming and testing hypotheses, constructing mathematical models of theoretical biology and biological theories, using observational data, and performing experiments in both the field and the laboratory. Evolution is a cornerstone of modern science, accepted as one of the most reliably established of all facts and theories of science, based on evidence not just from the biological sciences but also from anthropology, psychology, astrophysics, chemistry, geology, physics, mathematics, and other scientific disciplines, as well as behavioral and social sciences. Understanding of evolution has made significant contributions to humanity, including the prevention and treatment of human disease, new agricultural products, industrial innovations, a subfield of computer science, and rapid advances in life sciences. Discoveries in evolutionary biology have made a significant impact not just in the traditional branches of biology but also in other academic disciplines (e.g., biological anthropology and evolutionary psychology) and in society at large.