Adaptation to the Baltic Sea - the case of isopod genus
... The three marine isopods of the genus Idotea: I. balthica, I. chelipes and I. granulosa have an important functional role as meso-grazers in the Baltic food web. These meso-grazers are key species in the Fucus belt and in Zostera marina beds and are characterized by top-down effects through impressi ...
... The three marine isopods of the genus Idotea: I. balthica, I. chelipes and I. granulosa have an important functional role as meso-grazers in the Baltic food web. These meso-grazers are key species in the Fucus belt and in Zostera marina beds and are characterized by top-down effects through impressi ...
Genetic Drift and Gene Flow
... that are separated from exchanging genetic material with other organisms of the same species. This can lead to multiple new species from the original parent species. ...
... that are separated from exchanging genetic material with other organisms of the same species. This can lead to multiple new species from the original parent species. ...
Chapter 5 - Evolution of Biodiversity
... • Species – a group of organisms that is distinct from other groups in terms of size, shape, behavior, and biochemical properties, and that can interbreed and produce viable offspring • The number of species on Earth is difficult to estimate • Species are not evenly distributed on Earth ...
... • Species – a group of organisms that is distinct from other groups in terms of size, shape, behavior, and biochemical properties, and that can interbreed and produce viable offspring • The number of species on Earth is difficult to estimate • Species are not evenly distributed on Earth ...
Species Concepts Lesson Outline
... 2. Use examples to illustrate how species concepts are used to define species. 3. List advantages and disadvantages to the use of each of these species concepts Species Concepts 1. Biological Species Concept According to this concept, species are a group of organisms that are able, or potentially ab ...
... 2. Use examples to illustrate how species concepts are used to define species. 3. List advantages and disadvantages to the use of each of these species concepts Species Concepts 1. Biological Species Concept According to this concept, species are a group of organisms that are able, or potentially ab ...
Evolution_Performance_Task_2016
... Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/or (3) mutations caused by environmental factors. Communicate scientific information that common ancestry a ...
... Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/or (3) mutations caused by environmental factors. Communicate scientific information that common ancestry a ...
Population Genetic of Humboldt Penguin at South America
... The Humboldt penguins (Spheniscus humboldti) breed on islands and islets along the Pacific Ocean coast in South America, where goes the cold Humboldt current. This animal is greatly affected by climatic events like the El-niño because is difficult to move and find food, then many of them die, especi ...
... The Humboldt penguins (Spheniscus humboldti) breed on islands and islets along the Pacific Ocean coast in South America, where goes the cold Humboldt current. This animal is greatly affected by climatic events like the El-niño because is difficult to move and find food, then many of them die, especi ...
Population Dynamics
... Illustrative example: Change in the producer level can affect the number and size of other trophic levels. 2D.1c: The stability of populations, communities and ecosystems is affected by interactions with biotic and abiotic factors. Illustrative example: species diversity 4C.3a: A population’s abilit ...
... Illustrative example: Change in the producer level can affect the number and size of other trophic levels. 2D.1c: The stability of populations, communities and ecosystems is affected by interactions with biotic and abiotic factors. Illustrative example: species diversity 4C.3a: A population’s abilit ...
chapter 24 speciation
... interbreeding. Thus, no mixing of genes with other species occurs. Prezygotic barriers - Before the egg is fertilized. 1. Habitat Isolation - Organisms that spend their time in different places within the same area have little chance to interbreed. Ex. parasites on different host organisms. 2. Behav ...
... interbreeding. Thus, no mixing of genes with other species occurs. Prezygotic barriers - Before the egg is fertilized. 1. Habitat Isolation - Organisms that spend their time in different places within the same area have little chance to interbreed. Ex. parasites on different host organisms. 2. Behav ...
File - Mrs. LeCompte
... Plant geneticists are presently inducing these genetic accidents to produce new polyploids with high yields and disease resistance. ...
... Plant geneticists are presently inducing these genetic accidents to produce new polyploids with high yields and disease resistance. ...
Evolution- over time new types of organisms are developed from
... Evolution- over time new types of organisms are developed from preexisting organisms Strata- rock layers that are formed when new rock layers are deposited Natural Selection- a process in which organisms that adapt well to a different environment will survive and grow in population more easily than ...
... Evolution- over time new types of organisms are developed from preexisting organisms Strata- rock layers that are formed when new rock layers are deposited Natural Selection- a process in which organisms that adapt well to a different environment will survive and grow in population more easily than ...
Conservation of Biodiversity
... authorizes the U.S. Fish and Wildlife Service to determine which species can be listed as threatened or endangered and prohibits the harming of these species. © Trading these species is also illegal. © The act also authorizes the government to purchase habitat that is critical to the species. ...
... authorizes the U.S. Fish and Wildlife Service to determine which species can be listed as threatened or endangered and prohibits the harming of these species. © Trading these species is also illegal. © The act also authorizes the government to purchase habitat that is critical to the species. ...
PGS: 454 – 458
... a. Mutations are random changes that occur in an organism’s DNA. Some mutations help individuals survive in their environment and reproduce. Some mutations do not help an organism survive. Other mutations have no effect. b. If a mutation (change) occurs in the DNA of sex cells (gametes) of the paren ...
... a. Mutations are random changes that occur in an organism’s DNA. Some mutations help individuals survive in their environment and reproduce. Some mutations do not help an organism survive. Other mutations have no effect. b. If a mutation (change) occurs in the DNA of sex cells (gametes) of the paren ...
Mechanisms of Evolution
... 2. Resources are limited, so there is competition for those resources. 3. Organisms with favorable adaptations (characteristics) to a particular environment survive and leave more offspring than those without favorable adaptations. *variations exist within a species; some adaptations are advantageou ...
... 2. Resources are limited, so there is competition for those resources. 3. Organisms with favorable adaptations (characteristics) to a particular environment survive and leave more offspring than those without favorable adaptations. *variations exist within a species; some adaptations are advantageou ...
Characteristics of Populations
... geographic range causing population dispersion of organisms within a population to vary throughout the range! ...
... geographic range causing population dispersion of organisms within a population to vary throughout the range! ...
Conditions Required for Natural Selection
... function best tend to leave the most offspring - each new generation has a higher proportion of individuals with the advantageous traits ...
... function best tend to leave the most offspring - each new generation has a higher proportion of individuals with the advantageous traits ...
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.