Evolution….After Darwin…
... – While many take place slowly over generations – some events can be observed in our life times ...
... – While many take place slowly over generations – some events can be observed in our life times ...
Chapter 10
... 1. Species diversity: # of different sp. in an area; “biodiversity” 2. Ecosystem diversity: the variety of habitats, communities, and ecological processes w/i and btwn. ecosystems 3. Genetic diversity: all the different genes contained w/i all members of a population. --gene: piece of DNA, codes for ...
... 1. Species diversity: # of different sp. in an area; “biodiversity” 2. Ecosystem diversity: the variety of habitats, communities, and ecological processes w/i and btwn. ecosystems 3. Genetic diversity: all the different genes contained w/i all members of a population. --gene: piece of DNA, codes for ...
Evolution Practice Quiz Name: _____1. A species of bird lives in a
... population. As a result, this deer has several seconds of warning every time wolves or other predators attack. This trait may be selected by natural selection because it increases the deer's _______. A. ability to select mates B. ability to survive C. ability to find food D. sense of safety _______8 ...
... population. As a result, this deer has several seconds of warning every time wolves or other predators attack. This trait may be selected by natural selection because it increases the deer's _______. A. ability to select mates B. ability to survive C. ability to find food D. sense of safety _______8 ...
History of Evolution
... – Similarities between extinct fossils & modern life – Marine fossils atop mountains ...
... – Similarities between extinct fossils & modern life – Marine fossils atop mountains ...
Appendix A. Scientific Names Hybrid
... A variety is a different-looking form of the same species which occurs in nature. Seeds of the variety will be true to the parent. There are two good examples on campus: Thornless Honeylocust (scientific name Gleditsia triacanthos var. inermis), a thornless variety of Honeylocust (scientific name Gl ...
... A variety is a different-looking form of the same species which occurs in nature. Seeds of the variety will be true to the parent. There are two good examples on campus: Thornless Honeylocust (scientific name Gleditsia triacanthos var. inermis), a thornless variety of Honeylocust (scientific name Gl ...
Study Questions CH 24 - Oregon State University
... If two subspecies, A and B, are not considered separate species, even though they cannot interbreed, then… a) they are groups that are endemic to isolated geographic regions. b) gene flow between A and B may exist through other related subspecies. c) they have eliminated postzygotic barriers but not ...
... If two subspecies, A and B, are not considered separate species, even though they cannot interbreed, then… a) they are groups that are endemic to isolated geographic regions. b) gene flow between A and B may exist through other related subspecies. c) they have eliminated postzygotic barriers but not ...
Threatened, Endangered, and Extinct Species from Around the World
... Endangered species--a species that has been identified to be in danger of extinction throughout all or a significant part of its range, and that is thus under protection by regulations or conservation measures Endangered Species Act-- an act that the U.S. Congress passes in 1973 to protect any plant ...
... Endangered species--a species that has been identified to be in danger of extinction throughout all or a significant part of its range, and that is thus under protection by regulations or conservation measures Endangered Species Act-- an act that the U.S. Congress passes in 1973 to protect any plant ...
Mechanisms of Divergence •Natural selection •Genetic Drift •Sexual
... Sexual Selection as a Mechanism of Genetic Divergence •Specific kind of selection only concerned with the ability to find a mate •Changes in the way that members of a population choose mates can lead to rapid divergence and speciation. This kind of selection directly affects gene flow. Secondary Con ...
... Sexual Selection as a Mechanism of Genetic Divergence •Specific kind of selection only concerned with the ability to find a mate •Changes in the way that members of a population choose mates can lead to rapid divergence and speciation. This kind of selection directly affects gene flow. Secondary Con ...
PGS: 454 – 458
... i. Humans have millions of different populations, such as the population of Montgomery, Huntsville, Mobile, or the population of Birmingham. c. Different populations may or may not interact. It just depends on the species and if any geographic barriers (i.e. large mountains or large bodies of water) ...
... i. Humans have millions of different populations, such as the population of Montgomery, Huntsville, Mobile, or the population of Birmingham. c. Different populations may or may not interact. It just depends on the species and if any geographic barriers (i.e. large mountains or large bodies of water) ...
Ch 24
... Modes of speciation: Two ways speciation can occur: 1) Allopatric speciation: a population forms a new species while 2) Sympatric speciation: ...
... Modes of speciation: Two ways speciation can occur: 1) Allopatric speciation: a population forms a new species while 2) Sympatric speciation: ...
Evolution - Leeming-Biology-12
... • Isolation of a breeding population – this can either occur within the parent population (e.g. race or religion) or in isolation from the parent population (e.g. migration). • In both cases, interbreeding (gene flow) between the two populations is disrupted. ...
... • Isolation of a breeding population – this can either occur within the parent population (e.g. race or religion) or in isolation from the parent population (e.g. migration). • In both cases, interbreeding (gene flow) between the two populations is disrupted. ...
Evolution
... • Isolation of a breeding population – this can either occur within the parent population (e.g. race or religion) or in isolation from the parent population (e.g. migration). • In both cases, interbreeding (gene flow) between the two populations is disrupted. ...
... • Isolation of a breeding population – this can either occur within the parent population (e.g. race or religion) or in isolation from the parent population (e.g. migration). • In both cases, interbreeding (gene flow) between the two populations is disrupted. ...
Lecture 7
... (members of a single species) become separated by some type of geographical barrier (a river that cannot be crossed, an island, a mountain range). This prevents gene flow between the two separated populations and allows them to diverge in terms of their respective gene pools---that is, they can form ...
... (members of a single species) become separated by some type of geographical barrier (a river that cannot be crossed, an island, a mountain range). This prevents gene flow between the two separated populations and allows them to diverge in terms of their respective gene pools---that is, they can form ...
File
... Theory based on observations and deductions Observation Organisms produce more offspring than are needed to replace parents ...
... Theory based on observations and deductions Observation Organisms produce more offspring than are needed to replace parents ...
Speciation
... a. Habitats in an area become more ______ E.g., trees invade shrubland b. Segments of population ____ to different habitats E.g., different foods, shelter An example of ________ selection c. Genetic makeup of segments _______ Survival is most likely in your own habitat type d. Reproductive barriers ...
... a. Habitats in an area become more ______ E.g., trees invade shrubland b. Segments of population ____ to different habitats E.g., different foods, shelter An example of ________ selection c. Genetic makeup of segments _______ Survival is most likely in your own habitat type d. Reproductive barriers ...
What is Biology?
... Biology: Organisms: 1. Organization cells -> ___ ___ ___ specialization 2. Reproduction ...
... Biology: Organisms: 1. Organization cells -> ___ ___ ___ specialization 2. Reproduction ...
Origin of Species
... • Mating has occurred (Horses + Donkeys = Mules), but the offspring is infertile. • They are infertile because they have an odd number of chromosomes - cannot pair up. • This can happen artificially. ...
... • Mating has occurred (Horses + Donkeys = Mules), but the offspring is infertile. • They are infertile because they have an odd number of chromosomes - cannot pair up. • This can happen artificially. ...
Darwin and Evolution - Mamanakis
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
Evolution_Performance_Task_2016
... 1. Image(s) or drawing(s) of your artificially selected species 2. Image(s) or drawing(s) of your species wild ancestors or closest relations 3. A cladogram or phylogenetic tree to illustrate your species and its ancestors 4. Image(s) or drawing(s) of human interaction with the species 5. Bibliograp ...
... 1. Image(s) or drawing(s) of your artificially selected species 2. Image(s) or drawing(s) of your species wild ancestors or closest relations 3. A cladogram or phylogenetic tree to illustrate your species and its ancestors 4. Image(s) or drawing(s) of human interaction with the species 5. Bibliograp ...
Burweed Marsh Elder
... of the central part of the US. It may grow to be 6 feet tall. The specific name refers to the shape of the larger leaves, which are rather triangular or fan-shaped, resembling those of the Cocklebur. The undersides of the leaves are lighter in color than the upper surfaces. Young plants of Burweed M ...
... of the central part of the US. It may grow to be 6 feet tall. The specific name refers to the shape of the larger leaves, which are rather triangular or fan-shaped, resembling those of the Cocklebur. The undersides of the leaves are lighter in color than the upper surfaces. Young plants of Burweed M ...
16-1 Genetic Equilibrium
... – Bio = based on who can reproduce with who successfully (not useful for extinct or asexual organisms) – What do we use today? Mix of BOTH!!! ...
... – Bio = based on who can reproduce with who successfully (not useful for extinct or asexual organisms) – What do we use today? Mix of BOTH!!! ...
Asexual reproduction
... genetic information from each parent to mix, producing offspring that resemble their parents, but are not identical to them. In this way, sexual reproduction leads to variety in the offspring. Animals and plants can reproduce using sexual reproduction. ...
... genetic information from each parent to mix, producing offspring that resemble their parents, but are not identical to them. In this way, sexual reproduction leads to variety in the offspring. Animals and plants can reproduce using sexual reproduction. ...
Introduced the idea of “repair” into geological history
... limbs, and pharyngeal pouches. 5. How does natural selection affect the frequency of certain alleles in a population? (Pg. 281) Individuals that are best suited to survive and do well in their environment will produce the most offspring. So, the traits of those individuals will become more common in ...
... limbs, and pharyngeal pouches. 5. How does natural selection affect the frequency of certain alleles in a population? (Pg. 281) Individuals that are best suited to survive and do well in their environment will produce the most offspring. So, the traits of those individuals will become more common in ...
RegistrationGuide2014
... Wossner Jade (malipoense x niveum) is Primary, Paph. Sizzler (malipoense x Cabaret) is Near-Primary. 2. In a complex hybrid, both parents are hybrids. Example: Paph. Maud Green (Maudiae x Acteus). 3. A Multifloral Paph is one that bears three or more flowers open at the same time at maturity. Enter ...
... Wossner Jade (malipoense x niveum) is Primary, Paph. Sizzler (malipoense x Cabaret) is Near-Primary. 2. In a complex hybrid, both parents are hybrids. Example: Paph. Maud Green (Maudiae x Acteus). 3. A Multifloral Paph is one that bears three or more flowers open at the same time at maturity. Enter ...
Evolution and Natural Selection Notes
... offspring are born than can survive Competition/struggle for limited resources Some individuals are more genetically “fit” than others – they are better at surviving, reproducing, and passing on their genes Result: Over many generations, the “fit” alleles become more common in the whole populati ...
... offspring are born than can survive Competition/struggle for limited resources Some individuals are more genetically “fit” than others – they are better at surviving, reproducing, and passing on their genes Result: Over many generations, the “fit” alleles become more common in the whole populati ...
Hybrid (biology)
In biology a hybrid, also known as cross breed, is the result of mixing, through sexual reproduction, two animals or plants of different breeds, varieties, species or genera. Using genetic terminology, it may be defined as follows. Hybrid generally refers to any offspring resulting from the breeding of two genetically distinct individuals, which usually will result in a high degree of heterozygosity, though hybrid and heterozygous are not, strictly speaking, synonymous. a genetic hybrid carries two different alleles of the same gene a structural hybrid results from the fusion of gametes that have differing structure in at least one chromosome, as a result of structural abnormalities a numerical hybrid results from the fusion of gametes having different haploid numbers of chromosomes a permanent hybrid is a situation where only the heterozygous genotype occurs, because all homozygous combinations are lethal.From a taxonomic perspective, hybrid refers to: Offspring resulting from the interbreeding between two animal species or plant species. See also hybrid speciation. Hybrids between different subspecies within a species (such as between the Bengal tiger and Siberian tiger) are known as intra-specific hybrids. Hybrids between different species within the same genus (such as between lions and tigers) are sometimes known as interspecific hybrids or crosses. Hybrids between different genera (such as between sheep and goats) are known as intergeneric hybrids. Extremely rare interfamilial hybrids have been known to occur (such as the guineafowl hybrids). No interordinal (between different orders) animal hybrids are known. The third type of hybrid consists of crosses between populations, breeds or cultivars within a single species. This meaning is often used in plant and animal breeding, where hybrids are commonly produced and selected, because they have desirable characteristics not found or inconsistently present in the parent individuals or populations.↑ ↑ ↑ ↑