Part 1
:
Species
In biological terms, a
species
is defined as a group of organisms that are able to interbreed to produce fertile and viable offspring under natural conditions. This description of a species can further be characterized as
reproductive isolation
, where physical and sometimes behavioral traits of an organism will only allow them to reproduce with an organism that has the same traits. Using the aforementioned definition of a species, different breeds of dogs are able to produce fertile and viable offspring because they are all the same species, but dogs and cats are unable to interbreed because they are two different species.
Population
Now, extend the definition of a species to a group of the same species living in the same geographic area. This would represent a
population
. What would happen if the species within this population were suddenly split into two groups by an earthquake, creating a physical barrier such as a canyon? If a population is divided indefinitely by a barrier, members of the divided population will not have the opportunity to breed with each other.
Impacts
Over many years, the abiotic (nonliving) and biotic (living) conditions on either side of the physical barrier will vary from one another. As a result, natural selection will cause different selective and adaptive pressures to occur between the two divided populations, and they will evolve differently. Over time, this will result in
speciation
, which is the creation of two new species. This occurs because of reproductive isolation.
Part 2:
Timeline
Use the timeline to view the impact of speciation.
Your observations from the animation should be used to complete the lab worksheet.
(Audesirk, Audesirk, & Byers, 2008)
Reference
:
Audesirk, T., Audesirk, G., & Byers, B. E. (2008).
Biology: Life on earth with physiology
. Upper Saddle River, NJ: Prentice Hall.
End of Activity
.
Running head: Speciation in a population. 1
Speciation in a population 2
Sean Bradley
12/3/2014
Phase 2 Individual Project
Course: SCI203-1404B-16
Instructor: Rhonda McBride
What would happen if a species within a population were suddenly split into 2 groups by an earthquake that creates a physical barrier like a canyon?
If a species within a population is faced with a physical barrier such as an earthquake that renders their re-engagement with the population impossible, the organism would be prompted to adapt to the new habitat or circumstance. A population refers to the total sum of species in a given geographical area that live together and are capable of interbreeding. If this population is split, this process is called speciation and has the effect of causing the organisms to restructure their existential means in the new surroundings.
Speciation is the process by which an organism adapts to a newly acquired habitat by virtue of being forced to be present in that habitat either by natural occurrences or by reason of evolution. When an organism is shifted from its previous habitat to a new habitat, it has to find ways and means to adapt to the surrounding. It may achieve this by adapting enhanced or changed physical characteristics. Additionally, the species may change their breeding habits and this may ultimately lead to the development and evolution of two distinct organisms of the same species.
Speciation may take different forms. There is the allopatric speciation that occurs when the species in a given population are separated by a physical barrier. This physical separation makes it difficult for the organisms to breed with the members of the former population. Secondly, paripatric speciation takes place when a small number of species in a population dissociates from the main population in a manner similar to the allopatric speciation. The difference between allopatric and paripatric speciation is the fact that in allopatric speciation, the dissociation takes an almost equal number while in paripatric speciation there is a larger group and a smaller group when the dissociation takes place. When paripatric speciation occurs, the defining characteristics of the organisms are passed on to the future breeds and which serve to differentiate them from the other species of the same kind. Thirdly, there is the sympatric speciation which is distinguished by the emergence of new breeds of a species without having any dissociation or geographical barriers in a population. Lastly there is the artificial speciation which refers to the creation of new species and breeds through scientific means.
Reference being made to the discussion above, when organisms are split into two groups by a physical barrier, this could take the nature of an allopatric or paripatric speciation. Consequently, the following would happen t.
Running head: Speciation in a population. 1
Speciation in a population 2
Sean Bradley
12/3/2014
Phase 2 Individual Project
Course: SCI203-1404B-16
Instructor: Rhonda McBride
What would happen if a species within a population were suddenly split into 2 groups by an earthquake that creates a physical barrier like a canyon?
If a species within a population is faced with a physical barrier such as an earthquake that renders their re-engagement with the population impossible, the organism would be prompted to adapt to the new habitat or circumstance. A population refers to the total sum of species in a given geographical area that live together and are capable of interbreeding. If this population is split, this process is called speciation and has the effect of causing the organisms to restructure their existential means in the new surroundings.
Speciation is the process by which an organism adapts to a newly acquired habitat by virtue of being forced to be present in that habitat either by natural occurrences or by reason of evolution. When an organism is shifted from its previous habitat to a new habitat, it has to find ways and means to adapt to the surrounding. It may achieve this by adapting enhanced or changed physical characteristics. Additionally, the species may change their breeding habits and this may ultimately lead to the development and evolution of two distinct organisms of the same species.
Speciation may take different forms. There is the allopatric speciation that occurs when the species in a given population are separated by a physical barrier. This physical separation makes it difficult for the organisms to breed with the members of the former population. Secondly, paripatric speciation takes place when a small number of species in a population dissociates from the main population in a manner similar to the allopatric speciation. The difference between allopatric and paripatric speciation is the fact that in allopatric speciation, the dissociation takes an almost equal number while in paripatric speciation there is a larger group and a smaller group when the dissociation takes place. When paripatric speciation occurs, the defining characteristics of the organisms are passed on to the future breeds and which serve to differentiate them from the other species of the same kind. Thirdly, there is the sympatric speciation which is distinguished by the emergence of new breeds of a species without having any dissociation or geographical barriers in a population. Lastly there is the artificial speciation which refers to the creation of new species and breeds through scientific means.
Reference being made to the discussion above, when organisms are split into two groups by a physical barrier, this could take the nature of an allopatric or paripatric speciation. Consequently, the following would happen t.
Delivered this as talk series on Evolution to some of my colleagues interested in systems thinking. It was a great learning for me and will incorporate it into a sequel later.
Updates:
1. Version 2013.11.23 - Reorganized some slides, added images and credits
2. Version 2013.11.25 - Reorganized presentation around three aspects. Added better intro.
3. Version 2013.11.26 - Updated implications aspect for global warming and behavioral sink.
4. Version 2013.11.27 - Updated taxonomy discussion.
5. V 2013.12.05 - Updated natural selection, convergent evolution and punctuated equilibrium. Reorg of slides.
6. V 2013.12.16 - Added chaos and self-organization slides.
7. V 2013.12.21 - Added extinctions and explosions.
8. V2013.12.23 - Added more chaos explanation and Wikipedia logo.
9. V2014.05.05 - Corrected spelling mistakes and cleaned up slides.
Evolutionary relationships are the relationships between two different organisms that are related through the global process of evolution. In other words, they are the relationships between two species that have a common ancestor
NCERT Solutions | Class IX | Science (Biology) | Chapter 7 | Diversity in Liv...Biswarup Majumder
NCERT Solutions for Class 9 Biology is available in PDF format which you can download easily. Here is the most accurate and detailed Biology NCERT solutions for Class 9th CBSE textbook for free of cost.
I hope this document is helpful to you. Please share the document with your friends if you think this will benefit them. Get ready for the next solution. Thanks.
Write 250 to 300 words in which you describe a press release address.docxdunnramage
Write 250 to 300 words in which you describe a press release addressing a scandal or setback related to your chosen topic.
•Topic: the feminist movement
•Locate a press release addressing a scandal or other setback related to your chosen topic. This press release may address individuals involved in the field or movement or an issue which affects the field or movement itself.
•First, explain the nature of the scandal or setback, how this scandal affected an individual’s career or the field or movement as a whole, and what details of the scandal that the press release addressed or ignored.
•Next, discuss the role of the mass media in reporting this scandal and why it was newsworthy. Discuss the journalistic, political, and societal purpose of reporting it, and how the press release was written to mitigate the public response to the scandal. Also, discuss why a press release was preferable – for the client or the public – to the alternatives, such as tabloids, blogs, and rumors.
•Format your response consistent with APA guidelines.
.
Write 200 word response to each question1. During his campaign .docxdunnramage
Write 200 word response to each question:
1. During his campaign for president, Barack Obama used the phrase “post-racial America,” which was understood to mean that race and other identity groups would cease to be targets of prejudice. Although such tolerance has come a long way since the 1950's, what more could be done to bring us to a completely “post-racial” society?
2. Think of a situation where you worked successfully with people from identity groups other than your own. What allowed you to work successfully with them?
.
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Delivered this as talk series on Evolution to some of my colleagues interested in systems thinking. It was a great learning for me and will incorporate it into a sequel later.
Updates:
1. Version 2013.11.23 - Reorganized some slides, added images and credits
2. Version 2013.11.25 - Reorganized presentation around three aspects. Added better intro.
3. Version 2013.11.26 - Updated implications aspect for global warming and behavioral sink.
4. Version 2013.11.27 - Updated taxonomy discussion.
5. V 2013.12.05 - Updated natural selection, convergent evolution and punctuated equilibrium. Reorg of slides.
6. V 2013.12.16 - Added chaos and self-organization slides.
7. V 2013.12.21 - Added extinctions and explosions.
8. V2013.12.23 - Added more chaos explanation and Wikipedia logo.
9. V2014.05.05 - Corrected spelling mistakes and cleaned up slides.
Evolutionary relationships are the relationships between two different organisms that are related through the global process of evolution. In other words, they are the relationships between two species that have a common ancestor
NCERT Solutions | Class IX | Science (Biology) | Chapter 7 | Diversity in Liv...Biswarup Majumder
NCERT Solutions for Class 9 Biology is available in PDF format which you can download easily. Here is the most accurate and detailed Biology NCERT solutions for Class 9th CBSE textbook for free of cost.
I hope this document is helpful to you. Please share the document with your friends if you think this will benefit them. Get ready for the next solution. Thanks.
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Write 250 to 300 words in which you describe a press release addressing a scandal or setback related to your chosen topic.
•Topic: the feminist movement
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•First, explain the nature of the scandal or setback, how this scandal affected an individual’s career or the field or movement as a whole, and what details of the scandal that the press release addressed or ignored.
•Next, discuss the role of the mass media in reporting this scandal and why it was newsworthy. Discuss the journalistic, political, and societal purpose of reporting it, and how the press release was written to mitigate the public response to the scandal. Also, discuss why a press release was preferable – for the client or the public – to the alternatives, such as tabloids, blogs, and rumors.
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Student name:
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Part 1SpeciesIn biological terms, a species is defined as.docx
1. Part 1
:
Species
In biological terms, a
species
is defined as a group of organisms that are able to interbreed to
produce fertile and viable offspring under natural conditions.
This description of a species can further be characterized as
reproductive isolation
, where physical and sometimes behavioral traits of an organism
will only allow them to reproduce with an organism that has the
same traits. Using the aforementioned definition of a species,
different breeds of dogs are able to produce fertile and viable
offspring because they are all the same species, but dogs and
cats are unable to interbreed because they are two different
species.
Population
Now, extend the definition of a species to a group of the same
species living in the same geographic area. This would
represent a
population
. What would happen if the species within this population were
suddenly split into two groups by an earthquake, creating a
physical barrier such as a canyon? If a population is divided
indefinitely by a barrier, members of the divided population
will not have the opportunity to breed with each other.
Impacts
Over many years, the abiotic (nonliving) and biotic (living)
conditions on either side of the physical barrier will vary from
one another. As a result, natural selection will cause different
selective and adaptive pressures to occur between the two
divided populations, and they will evolve differently. Over
time, this will result in
speciation
, which is the creation of two new species. This occurs because
2. of reproductive isolation.
Part 2:
Timeline
Use the timeline to view the impact of speciation.
Your observations from the animation should be used to
complete the lab worksheet.
(Audesirk, Audesirk, & Byers, 2008)
Reference
:
Audesirk, T., Audesirk, G., & Byers, B. E. (2008).
Biology: Life on earth with physiology
. Upper Saddle River, NJ: Prentice Hall.
End of Activity
