Zygotic Barriers (Macro 2)
... “together”) genetic isolation WITHOUT a geographical barrier; a reproductive barrier isolates population in SAME habitat ...
... “together”) genetic isolation WITHOUT a geographical barrier; a reproductive barrier isolates population in SAME habitat ...
mass extinctions
... edge effect- the change in species composition produced at ecotones 2. Inverse relationship to the geographical isolation of a community. 3. Reduced when one or more species is dominant in a community (competition) 4. Inversely related to the stress on a habitat 5. Geological history – (climate chan ...
... edge effect- the change in species composition produced at ecotones 2. Inverse relationship to the geographical isolation of a community. 3. Reduced when one or more species is dominant in a community (competition) 4. Inversely related to the stress on a habitat 5. Geological history – (climate chan ...
Chapter 24: The Origin of Species AP Biology I. Chapter 24
... asexual organisms 2. example: difficult to apply the biological species concept to the many sexual organisms about which little is known regarding their ability to mate with different kinds of organisms D. ...
... asexual organisms 2. example: difficult to apply the biological species concept to the many sexual organisms about which little is known regarding their ability to mate with different kinds of organisms D. ...
ICA 1 SPECIES ABUNDANCE + LOCAL SPECIES DIVERSITY 1
... delta – available species pool within dispersal distance (up to continental scale) 15. Figure 11. What is the relationship between species richness and area? Species richness increases with increasing area. On what scale are the two variables plotted? Both are on log scale. How is the relationship s ...
... delta – available species pool within dispersal distance (up to continental scale) 15. Figure 11. What is the relationship between species richness and area? Species richness increases with increasing area. On what scale are the two variables plotted? Both are on log scale. How is the relationship s ...
data analysis - DCU School of Computing
... • Genetic Map -Models linear arrangement of group of genes / markers (easily identified genetic features - e.g. change in known gene, piece of DNA with no known function). Map based on homologous recombination during meiosis. If two or more markers located close together on chromosome, alleles usual ...
... • Genetic Map -Models linear arrangement of group of genes / markers (easily identified genetic features - e.g. change in known gene, piece of DNA with no known function). Map based on homologous recombination during meiosis. If two or more markers located close together on chromosome, alleles usual ...
Chapter 24 Slides
... The origin of a new species Speciation is a focal point of evolutionary theory Must explain how new species originate and how populations evolve ...
... The origin of a new species Speciation is a focal point of evolutionary theory Must explain how new species originate and how populations evolve ...
Species concepts, Reproductive barriers, speciation - Jocha
... 1) Interbreeding population of one species 2) The population becomes divided by a physical barrier such as water, mountains, desert. This can happen when some of the population migrates, or when the geography changes catastrophically (e.g. earthquakes, floods) or gradually (erosion, continental drif ...
... 1) Interbreeding population of one species 2) The population becomes divided by a physical barrier such as water, mountains, desert. This can happen when some of the population migrates, or when the geography changes catastrophically (e.g. earthquakes, floods) or gradually (erosion, continental drif ...
Population and Community Ecology (BSC 441, 541) • Syllabus
... have something important to say. Community ecology, Mittelbach admits, is that kind of book. It reflects his long interest and outstanding contributions to the role of population interactions in regulating diversity and abundance. It is structured like a one-semester course for senior undergrads and ...
... have something important to say. Community ecology, Mittelbach admits, is that kind of book. It reflects his long interest and outstanding contributions to the role of population interactions in regulating diversity and abundance. It is structured like a one-semester course for senior undergrads and ...
Evolution Review Spring 08 (Ch
... 3. Divergence of 2 or more species from an existing one. 4. The total and permanent disappearance of a species from Earth. 5. Difference in the physical traits (phenotype) of an individual from those of other individuals in a group. 6. When individuals in a population with the intermediate phenotype ...
... 3. Divergence of 2 or more species from an existing one. 4. The total and permanent disappearance of a species from Earth. 5. Difference in the physical traits (phenotype) of an individual from those of other individuals in a group. 6. When individuals in a population with the intermediate phenotype ...
Chapter 2 - Green Resistance
... Darwin and Wallace – field ecologists – realized this argument applied equally to plant and animal kingdoms ...
... Darwin and Wallace – field ecologists – realized this argument applied equally to plant and animal kingdoms ...
SPECIATION Why do species exist? •Altitude symbolises fitness
... •A polyploidy individual is genetically isolated from nonpolyploid relations – even if they are crossed, the offspring will not survive (or will have a very low survival rate) or will be infertile because of the unbalanced number of chromosomes. •It also has been observed in plants that plants with ...
... •A polyploidy individual is genetically isolated from nonpolyploid relations – even if they are crossed, the offspring will not survive (or will have a very low survival rate) or will be infertile because of the unbalanced number of chromosomes. •It also has been observed in plants that plants with ...
The Origin of Species
... The biological concept of species Prezygotic and postzygotic barriers that maintain reproductive isolation in natural populations A description of similar species that are maintained separate by each type of isolating barrier How allopatric and sympatric speciation are similar and different ...
... The biological concept of species Prezygotic and postzygotic barriers that maintain reproductive isolation in natural populations A description of similar species that are maintained separate by each type of isolating barrier How allopatric and sympatric speciation are similar and different ...
Species distribution
Species distribution is the manner in which a biological taxon is spatially arranged. Species distribution is not to be confused with dispersal, which is the movement of individuals away from their area of origin or from centers of high population density. A similar concept is the species range. A species range is often represented with a species range map. Biogeographers try to understand the factors determining a species' distribution. The pattern of distribution is not permanent for each species. Distribution patterns can change seasonally, in response to the availability of resources, and also depending on the scale at which they are viewed. Dispersion usually takes place at the time of reproduction. Populations within a species are translocated through many methods, including dispersal by people, wind, water and animals. Humans are one of the largest distributors due to the current trends in globalization and the expanse of the transportation industry. For example, large tankers often fill their ballasts with water at one port and empty them in another, causing a wider distribution of aquatic species.Biogeography is the study of the distribution of biodiversity over space and time. It is very useful in understanding species distribution through factors such as speciation, extinction, continental drift, glaciation, variation of sea levels, river capture and available resources. This branch of study not only gives a description of the species distribution, but also a geographical explanation for the distribution of particular species. The traditional biogeographic regions were first modeled by Alfred Wallace in The Geographical Distribution of Animals (1876). These were based on the work of Sclater's terrestrial biogeographic regions. Wallace's system was based on both birds and vertebrates, including non-flying mammals, which better reflect the natural divisions of the Earth due to their limited dispersal abilities.