Ch. 5 notes
... 1. A physical barrier separates a single interbreeding population into two or more groups that are isolated from each other. 2. Natural selection works on the separated groups independently, resulting in inherited differences in the two populations. (defenses in selective pressures). 3. Physical and ...
... 1. A physical barrier separates a single interbreeding population into two or more groups that are isolated from each other. 2. Natural selection works on the separated groups independently, resulting in inherited differences in the two populations. (defenses in selective pressures). 3. Physical and ...
Units 1 and 2 - MsOttoliniBiology
... (B) Development of more efficient attack behavior (C) Further emigration when carrying capacity was reached (D) Genetic drift 8. Trout in stream A and trout in stream B look similar, but not quite identical. Scientists were unsure if they were two populations of one fish species, or two separate spe ...
... (B) Development of more efficient attack behavior (C) Further emigration when carrying capacity was reached (D) Genetic drift 8. Trout in stream A and trout in stream B look similar, but not quite identical. Scientists were unsure if they were two populations of one fish species, or two separate spe ...
Genetic Variation Within Population
... Genetic variation comes from several sources. • Hybridization is the crossing of two different species. – occurs when individuals can’t find mate of own species – topic of current scientific research ...
... Genetic variation comes from several sources. • Hybridization is the crossing of two different species. – occurs when individuals can’t find mate of own species – topic of current scientific research ...
B 262, F 2004 – I C
... rainforest was broken into smaller areas separated by grassland, later the tropical forest continuous again. (c) Briefly, how could this past pattern increase species diversity in Amazonia? (4%) ...
... rainforest was broken into smaller areas separated by grassland, later the tropical forest continuous again. (c) Briefly, how could this past pattern increase species diversity in Amazonia? (4%) ...
Unit 09 - Lessons 1-3
... ! Genetic variation comes from several sources. 3) Hybridization is the crossing of two different species. – occurs when individuals can t find mate of own species – topic of current scientific research ...
... ! Genetic variation comes from several sources. 3) Hybridization is the crossing of two different species. – occurs when individuals can t find mate of own species – topic of current scientific research ...
Evolution Review Game
... which one organism lives within the body of another. _________________ and _________________ may have developed through this process. ...
... which one organism lives within the body of another. _________________ and _________________ may have developed through this process. ...
Chapter 16 - Microevolution
... A. Darwin’s main ideas: ◦ 1. Overproduction of offspring ◦ 2. Variety among individuals of a population ◦ 3. Varying traits passed to offspring ◦ 4. Natural Selection: individuals of a population who were genetically fit for their environment are most likely to survive and reproduce Based on arti ...
... A. Darwin’s main ideas: ◦ 1. Overproduction of offspring ◦ 2. Variety among individuals of a population ◦ 3. Varying traits passed to offspring ◦ 4. Natural Selection: individuals of a population who were genetically fit for their environment are most likely to survive and reproduce Based on arti ...
Evolution Class Notes
... the bases of their leaves that secrete nectar. These hollow thorns are the exclusive nest-site of some species of ant that drink the nectar. But the ants are not just taking advantage of the plant—they also defend their acacia plant against herbivores. ...
... the bases of their leaves that secrete nectar. These hollow thorns are the exclusive nest-site of some species of ant that drink the nectar. But the ants are not just taking advantage of the plant—they also defend their acacia plant against herbivores. ...
PPEvolution_notes_01_April
... on the favorable variations to their offspring (& population ). These changes improve the __________________________________ (population) in its environment ...
... on the favorable variations to their offspring (& population ). These changes improve the __________________________________ (population) in its environment ...
population
... perpetual (permanent) change gradualism (slow and continual development) multiplication of species natural selection (major guiding force of evolution) sexual selection heritable variation within populations Ch. Darwin: On the origin of species by means of natural selection, or the prese ...
... perpetual (permanent) change gradualism (slow and continual development) multiplication of species natural selection (major guiding force of evolution) sexual selection heritable variation within populations Ch. Darwin: On the origin of species by means of natural selection, or the prese ...
Evolution for Beginners
... very closely resembled those animals. • This is what we now call biogeography. • Embryology- Organism look very similar in as they are developing, but develop differently as adults. ...
... very closely resembled those animals. • This is what we now call biogeography. • Embryology- Organism look very similar in as they are developing, but develop differently as adults. ...
population
... population to remain at HW EQUALIBRIUM population is enough large population is panmictic (random mating) mating of individuals of same generation NO natural selection NO mutation NO genetic drift NO gene flow (immigration or emigration) if one of the conditions is broken, evolutionary forc ...
... population to remain at HW EQUALIBRIUM population is enough large population is panmictic (random mating) mating of individuals of same generation NO natural selection NO mutation NO genetic drift NO gene flow (immigration or emigration) if one of the conditions is broken, evolutionary forc ...
Evolution Mechanisms
... Gradualism: the theory that species changed very gradually over time. Fossil evidence shows jumps, but the hypothesis is that we simply haven’t found the in-between fossils (missing links). Punctuated equilibrium: The theory that species are relatively unchanged for long periods, but then go through ...
... Gradualism: the theory that species changed very gradually over time. Fossil evidence shows jumps, but the hypothesis is that we simply haven’t found the in-between fossils (missing links). Punctuated equilibrium: The theory that species are relatively unchanged for long periods, but then go through ...
Chapter 17 Microevoltion
... 3) One unusual finch used a twig or thorn to pry out insects, a job normally done by (missing) woodpeckers (Darwin never witnessed this finch behavior). 4) The variation in finches posed questions to Darwin: did they descend from one mainland ancestor or did islands allow isolated populations to evo ...
... 3) One unusual finch used a twig or thorn to pry out insects, a job normally done by (missing) woodpeckers (Darwin never witnessed this finch behavior). 4) The variation in finches posed questions to Darwin: did they descend from one mainland ancestor or did islands allow isolated populations to evo ...
Descent With Modification: A Darwinian View of Life
... leave offspring who inherit the traits of their parents. In turn, the best adapted of these offspring leave the most offspring. Over time, traits best adapted for survival in the environment and the alleles that generate them accumulate in the population. Evolution occurs as advantageous traits accu ...
... leave offspring who inherit the traits of their parents. In turn, the best adapted of these offspring leave the most offspring. Over time, traits best adapted for survival in the environment and the alleles that generate them accumulate in the population. Evolution occurs as advantageous traits accu ...
Evolution Notes IB - Dynamic Science Logo
... 5.4.U3 Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor. 5.4.U5 Cladograms are tree diagrams that show the most probable sequence of divergence in clades. 5.4.U6 ...
... 5.4.U3 Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor. 5.4.U5 Cladograms are tree diagrams that show the most probable sequence of divergence in clades. 5.4.U6 ...
Evolution
... Punctuated equilibrium- speciation occurs quickly in rapid bursts due to changes in ...
... Punctuated equilibrium- speciation occurs quickly in rapid bursts due to changes in ...
video slide
... • A species is defined as any two organisms who reproduce and produce fertile, healthy offspring. • One of the most important concepts in the theory of evolution is speciation, or the development of a new species from one that already exists. ...
... • A species is defined as any two organisms who reproduce and produce fertile, healthy offspring. • One of the most important concepts in the theory of evolution is speciation, or the development of a new species from one that already exists. ...
Document
... Alignment of sequences with many differences underestimates the actual number of substitutions. ...
... Alignment of sequences with many differences underestimates the actual number of substitutions. ...
Chapter 17 Evolution of Populations
... 1. Founders arrive - mainland species flew or were blown to islands 2. Separation of populations populations remained separate due to water between islands and mainland (geographic isolation) 3. Changes in gene pool - occur over time as organisms became adapted to their local habitats 4. Reproductiv ...
... 1. Founders arrive - mainland species flew or were blown to islands 2. Separation of populations populations remained separate due to water between islands and mainland (geographic isolation) 3. Changes in gene pool - occur over time as organisms became adapted to their local habitats 4. Reproductiv ...
3.4-Evolutionary Mechanisms
... have blue stripes in open areas and orange stripes in forested areas The average size of salmon due to over-fishing in British Columbia ...
... have blue stripes in open areas and orange stripes in forested areas The average size of salmon due to over-fishing in British Columbia ...
A.) Variation in traits exists within a population. B.) The variation is
... Variation exists among individuals within a species ...
... Variation exists among individuals within a species ...
Chapter 22 Notes
... Organisms with these traits favored by the environment tend to produce more offspring than do organisms without those traits o Artificial Selection Artificial selection: modifying of species over many generations by selecting and breeding individuals that possess desired traits As a result, cr ...
... Organisms with these traits favored by the environment tend to produce more offspring than do organisms without those traits o Artificial Selection Artificial selection: modifying of species over many generations by selecting and breeding individuals that possess desired traits As a result, cr ...
Speciation
Speciation is the evolutionary process by which new biological species arise. The biologist Orator F. Cook was the first to coin the term 'speciation' for the splitting of lineages or ""cladogenesis,"" as opposed to ""anagenesis"" or ""phyletic evolution"" occurring within lineages. Charles Darwin was the first to describe the role of natural selection in speciation. There is research comparing the intensity of sexual selection in different clades with their number of species.There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric, peripatric, parapatric, and sympatric. Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments. Whether genetic drift is a minor or major contributor to speciation is the subject matter of much ongoing discussion.