Life Sciences 11 - BC Science Teachers` Association
... How might the range of abiotic and biotic characteristics on Earth help us to understand space exploration (e.g., extreme environments — ...
... How might the range of abiotic and biotic characteristics on Earth help us to understand space exploration (e.g., extreme environments — ...
Ideas that shaped Darwin`s idea Slide One: James Hutton (1795
... and that the _____________________________________________________________________ in modern times. Slide Seven: Darwin set sail on the _____________________________ (1831-1836) to survey the south seas (mainly South America and the Galapagos Islands) to ___________________________________________ ...
... and that the _____________________________________________________________________ in modern times. Slide Seven: Darwin set sail on the _____________________________ (1831-1836) to survey the south seas (mainly South America and the Galapagos Islands) to ___________________________________________ ...
Marco Trujillo Human Origins 1020 8/7/13 Professor Teri Potter
... One of the most important contributions made to the science of evolution was made by Charles Darwin and the concept of natural selection. The idea that members of a species compete with each other for resources and that individuals that are better adapted to their lifestyle have a better chance of s ...
... One of the most important contributions made to the science of evolution was made by Charles Darwin and the concept of natural selection. The idea that members of a species compete with each other for resources and that individuals that are better adapted to their lifestyle have a better chance of s ...
Exam 1 Student Learning Objectives
... 4. How does the Hardy-Weinberg (H-W) principle explain the diversity of organisms on earth or does it? 5. What are the H-W conditions and how are they applied to explain to explain animal population diversity? 6. What are the trends in microevolution (gene flow, genetic drift, mutation, mating, and ...
... 4. How does the Hardy-Weinberg (H-W) principle explain the diversity of organisms on earth or does it? 5. What are the H-W conditions and how are they applied to explain to explain animal population diversity? 6. What are the trends in microevolution (gene flow, genetic drift, mutation, mating, and ...
ch04_sec2 revised
... • Natural selection is the process by which individuals that have favorable variations and are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do. • Darwin proposed that over many generations, natural selection causes the characteristics ...
... • Natural selection is the process by which individuals that have favorable variations and are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do. • Darwin proposed that over many generations, natural selection causes the characteristics ...
Phil 306: Egoism and Altruism EVOLUTIONARY THEORY AND
... E. But how does NS operate on those organisms? To put it another way, what is the unit of organism that is “selected” in natural selection? Still controversy over this, but following are plausible: 1. the individual organism (e.g. a single cat, bird, bonobo, or human being) 2. the group of a type of ...
... E. But how does NS operate on those organisms? To put it another way, what is the unit of organism that is “selected” in natural selection? Still controversy over this, but following are plausible: 1. the individual organism (e.g. a single cat, bird, bonobo, or human being) 2. the group of a type of ...
Title of Unit
... a. Explain that physical characteristics of organisms have changed over successive generations (e.g. Darwin’s finches and peppered moths of Manchester). b. Describe ways in which species on earth have evolved due to natural selection. c. Trace evidence that the fossil record found in sedimentary roc ...
... a. Explain that physical characteristics of organisms have changed over successive generations (e.g. Darwin’s finches and peppered moths of Manchester). b. Describe ways in which species on earth have evolved due to natural selection. c. Trace evidence that the fossil record found in sedimentary roc ...
Changes in Species
... 16. Read the Biological Challenge on p. 512 about mass extinctions. In the diagram below are the 5 major mass extinctions of Earth’s history. Study the diagram, then answer the question below it. ...
... 16. Read the Biological Challenge on p. 512 about mass extinctions. In the diagram below are the 5 major mass extinctions of Earth’s history. Study the diagram, then answer the question below it. ...
FREE Sample Here
... Full file at http://testbank360.eu/test-bank-psychology-8th-edition-gleitman a. The process of natural selection helps drive which choice of mate. Many females have high reproductive costs and often do the ...
... Full file at http://testbank360.eu/test-bank-psychology-8th-edition-gleitman a. The process of natural selection helps drive which choice of mate. Many females have high reproductive costs and often do the ...
How Do New Species Form
... Geographic (6) ________________ has also occurred on a world-wide scale. For example, hundreds of millions of years ago, all Earth's land masses were connected as one (7)____________ . It formed a supercontinent called (8) ____________. Organisms could migrate from one part of the (9) ______________ ...
... Geographic (6) ________________ has also occurred on a world-wide scale. For example, hundreds of millions of years ago, all Earth's land masses were connected as one (7)____________ . It formed a supercontinent called (8) ____________. Organisms could migrate from one part of the (9) ______________ ...
How Do New Species Form?
... Geographic (6) ________________ has also occurred on a world-wide scale. For example, hundreds of millions of years ago, all Earth's land masses were connected as one (7)____________ . It formed a supercontinent called (8) ____________. Organisms could migrate from one part of the (9) ______________ ...
... Geographic (6) ________________ has also occurred on a world-wide scale. For example, hundreds of millions of years ago, all Earth's land masses were connected as one (7)____________ . It formed a supercontinent called (8) ____________. Organisms could migrate from one part of the (9) ______________ ...
CH. 23 (A): EVOLUTION of
... 1) Extremely large population size. The smaller the population, the greater the role played by chance fluctuations in allele frequencies from one generation to the next, known as _____________ __________. 2) No gene flow. Gene flow, the transfer of alleles between _______________ can alter allele fr ...
... 1) Extremely large population size. The smaller the population, the greater the role played by chance fluctuations in allele frequencies from one generation to the next, known as _____________ __________. 2) No gene flow. Gene flow, the transfer of alleles between _______________ can alter allele fr ...
Darwin PowerPoint Notes
... were ________________ for the type of food they ate. Darwin hypothesized that an _____________ species of finch from the mainland somehow ended up on the Galapagos Islands. The finches of that species scattered to different environments. There, they had to adapt to different conditions. Over many ge ...
... were ________________ for the type of food they ate. Darwin hypothesized that an _____________ species of finch from the mainland somehow ended up on the Galapagos Islands. The finches of that species scattered to different environments. There, they had to adapt to different conditions. Over many ge ...
Name Date ______ Period
... Explain how Hutton’s and Lyell’s ideas about the formation of the Earth influenced Darwin’s ideas about Evolution. Darwin realized that change took time and that the Earth was constantly changing/evolving so why couldn’t this principle apply to living organisms? On the Galapagos Islands, Darwin disc ...
... Explain how Hutton’s and Lyell’s ideas about the formation of the Earth influenced Darwin’s ideas about Evolution. Darwin realized that change took time and that the Earth was constantly changing/evolving so why couldn’t this principle apply to living organisms? On the Galapagos Islands, Darwin disc ...
EvolutionTest
... Characteristics that are acquired during the life of an individual are passed on to the offspring Organisms tend to increase in numbers at a rate more rapid than the environment can support On average, the best adapted individuals leave more offspring There exists in nature a constant struggle for s ...
... Characteristics that are acquired during the life of an individual are passed on to the offspring Organisms tend to increase in numbers at a rate more rapid than the environment can support On average, the best adapted individuals leave more offspring There exists in nature a constant struggle for s ...
Chapter 13
... thousands of generations. • Darwin envisioned the diversity of life as evolving by a gradual accumulation of minute changes through the actions of natural selection operating over vast spans of time. • While natural selection involves interactions between individual organisms and their environment, ...
... thousands of generations. • Darwin envisioned the diversity of life as evolving by a gradual accumulation of minute changes through the actions of natural selection operating over vast spans of time. • While natural selection involves interactions between individual organisms and their environment, ...
Chapter 23: Microevolution
... 1. migrating individuals carry their alleles with them (gene flow), usually resulting in changes in allele frequencies 2. gene flow tends to decrease genetic variation between populations C. mutations increase variation in the gene pool of a species 1. remember that mutations may be neutral, harmful ...
... 1. migrating individuals carry their alleles with them (gene flow), usually resulting in changes in allele frequencies 2. gene flow tends to decrease genetic variation between populations C. mutations increase variation in the gene pool of a species 1. remember that mutations may be neutral, harmful ...
X Multiple Centers of Creation (de Buffon) X Catastrophism
... X Acquired characteristics (Jean Baptiste de Lamarck) ...
... X Acquired characteristics (Jean Baptiste de Lamarck) ...
File - Intervention
... What contributes to differential reproductive success? Natural selection explains how species evolve, or change, over time. Natural selection is based on several key principles: Overproduction- Populations tend to produce more offspring than can possibly survive. When this happens, the likelihood ...
... What contributes to differential reproductive success? Natural selection explains how species evolve, or change, over time. Natural selection is based on several key principles: Overproduction- Populations tend to produce more offspring than can possibly survive. When this happens, the likelihood ...
Lesson 2
... populations. The lineage has split now that genes cannot flow between the populations. ...
... populations. The lineage has split now that genes cannot flow between the populations. ...
The Evolution of Populations
... visited preferentially by pollinating insects and so are more successful at producing offspring. The whiteflowered plants, by contrast, leave only 75% of the descendents that red-flowered plants do. We arbitrarily assign a fitness value of 1.0 to the more successful genotypes; thus the fitness of RR ...
... visited preferentially by pollinating insects and so are more successful at producing offspring. The whiteflowered plants, by contrast, leave only 75% of the descendents that red-flowered plants do. We arbitrarily assign a fitness value of 1.0 to the more successful genotypes; thus the fitness of RR ...
Darwin`s Influences
... ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ _______________________________________ ...
... ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ _______________________________________ ...
Introduction to evolution
Evolution is the process of change in all forms of life over generations, and evolutionary biology is the study of how evolution occurs. Biological populations evolve through genetic changes that correspond to changes in the organisms' observable traits. Genetic changes include mutations, which are caused by damage or replication errors in an organism's DNA. As the genetic variation of a population drifts randomly over generations, natural selection gradually leads traits to become more or less common based on the relative reproductive success of organisms with those traits.The age of the Earth is about 4.54 billion years old. The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era after a geological crust started to solidify following the earlier molten Hadean Eon. There are microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. Other early physical evidence of a biogenic substance is graphite in 3.7 billion-year-old metasedimentary rocks discovered in western Greenland. 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.Evolution does not attempt to explain the origin of life (covered instead by abiogenesis), but it does explain how the extremely simple early lifeforms evolved into the complex ecosystem that we see today. Based on the similarities between all present-day organisms, all life on Earth originated through common descent from a last universal ancestor from which all known species have diverged through the process of evolution. All individuals have hereditary material in the form of genes that are received from their parents, then passed on to any offspring. Among offspring there are variations of genes due to the introduction of new genes via random changes called mutations or via reshuffling of existing genes during sexual reproduction. The offspring differs from the parent in minor random ways. If those differences are helpful, the offspring is more likely to survive and reproduce. This means that more offspring in the next generation will have that helpful difference and individuals will not have equal chances of reproductive success. In this way, traits that result in organisms being better adapted to their living conditions become more common in descendant populations. These differences accumulate resulting in changes within the population. This process is responsible for the many diverse life forms in the world.The forces of evolution are most evident when populations become isolated, either through geographic distance or by other mechanisms that prevent genetic exchange. Over time, isolated populations can branch off into new species.The majority of genetic mutations neither assist, change the appearance of, nor bring harm to individuals. Through the process of genetic drift, these mutated genes are neutrally sorted among populations and survive across generations by chance alone. In contrast to genetic drift, natural selection is not a random process because it acts on traits that are necessary for survival and reproduction. Natural selection and random genetic drift are constant and dynamic parts of life and over time this has shaped the branching structure in the tree of life.The modern understanding of evolution began with the 1859 publication of Charles Darwin's On the Origin of Species. In addition, Gregor Mendel's work with plants helped to explain the hereditary patterns of genetics. Fossil discoveries in paleontology, advances in population genetics and a global network of scientific research have provided further details into the mechanisms of evolution. Scientists now have a good understanding of the origin of new species (speciation) and have observed the speciation process in the laboratory and in the wild. Evolution is the principal scientific theory that biologists use to understand life and is used in many disciplines, including medicine, psychology, conservation biology, anthropology, forensics, agriculture and other social-cultural applications.