Biology 2483A Lecture Notes - Lecture 5: Trophy Hunting, Krill, Adaptive Radiation

22 views2 pages

tealsea-lion742

3 Jan 2018

School

Western University

Department

Biology

Course

Biology 2483A

Professor

Graham Taylorand Sheila Macfie

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Dar(cid:449)i(cid:374) (cid:894)(cid:1005)(cid:1012)5(cid:1013): p. (cid:1005)5(cid:1006)(cid:895) stated, (cid:858)(cid:858)that (cid:374)atural sele(cid:272)tio(cid:374) (cid:449)ill al(cid:449)a(cid:455)s a(cid:272)t (cid:449)ith e(cid:454)tre(cid:373)e slo(cid:449)(cid:374)ess(cid:859)(cid:859) We know this is wrong today but that is the way we think about evolution. Long-term patterns of evolution are shaped by large-scale processes such as speciation, mass extinction, and adaptive radiation. A population that breeds amongst itself and is isolated from another population, reproduction amongst the individuals in the population. Evolution happens when you see a diff between two populations and that diff is at the genetic level. If there is ge(cid:374)e flo(cid:449) (cid:271)et(cid:449)ee(cid:374) pops the(cid:374) (cid:455)ou(cid:859)re (cid:374)ot a separate spe(cid:272)ies. The genetic divergence of populations over time can lead to speciation. Create barriers for species to connect with one another. One group is mostly terrestrial but the other is fully aquatic. These are all extant animals all living today. If you look at the fossil records it includes extinct animals diversity that we don"t see today.

Related Questions

1/ What is the difference between the different patterns ofselection: directional, stabilizing, anddiversifying?

2/ How do bacteria acquire genetic variation and how does thatdiffer from the mechanism by which humans acquire variation?

3/ What were the key observations made by Darwin to develop thebasic tenants of the theory of evolution? Has thistheory been tested?

4/ What are the most common misconceptionsabout evolution and why are they not valid arguments againstevolution?

5/ The key component of the theory of evolution isnatural selection. Define this process. Why is itcommonly known as âsurvival of the fittestâ? What are examples offactors (selective pressures) that drive evolutionof populations?

6/ What is the indirect evidence of evolution? What arehomologous and analogousstructures? What is convergent evolution?How does similarity of proteins between different species supportthe idea of evolution?

7/ Be able to explain why the following statement is true:Natural Selection works on individuals while evolution works onpopulations over generations. Or to put it another way: Individualsdo not evolve, populations do.

8/ How can evolution explain theformation of complex structures such as the eye or the flagellamotor?

9/ What causes variation in a species? To putthis another way: all humans have the same genes, yet we do notlook alike. What is the reason for the phenotypicdifferences between individuals of the same species? What isgenetic recombination?

10/ What are the dangers of small populations of a species froma genetic and evolutionary standpoint? What is thebottleneck effect?

11. How does speciation occur? What is theimportance of geographic isolation? How is thisillustrated in the Galapagos?

12. What is Darwinian Medicine and how does ithelp us better understand medical conditions?

copperhornet769

1. What is the difference between the different patternsof selection: directional, stabilizing, anddiversifying?

2. How do bacteria acquire genetic variation and how doesthat differ from the mechanism by which humans acquirevariation?

3. What were the key observations made by Darwin todevelop the basic tenants of the theory of evolution? Has thistheory been tested?

4. What are the most common misconceptions about evolutionand why are they not valid arguments against evolution?

5. The key component of the theory of evolution is naturalselection. Define this process. Why is it commonly known asâsurvival of the fittestâ? What are examples of factors (selectivepressures) that drive evolution of populations?

6. What is the indirect evidence of evolution? What arehomologous and analogous structures? What is convergent evolution?How does similarity of proteins between different species supportthe idea of evolution?

7. Be able to explain why the following statement is true:Natural Selection works on individuals while evolution works onpopulations over generations. Or to put it another way: Individualsdo not evolve, populations do.

8. How can evolution explain the formation of complexstructures such as the eye or the flagella motor?

9. What causes variation in a species? To put this anotherway: all humans have the same genes, yet we do not look alike. Whatis the reason fro the phenotypic differences between individuals ofthe same species? What is genetic recombination?

10. What are the dangers of small populations of a speciesfrom a genetic and evolutionary standpoint? What is the bottleneckeffect?

11. How does speciation occur? What is the importance ofgeographic isolation? How is this illustrated in theGalapagos?

12. What is Darwinian Medicine and how does it help usbetter understand medical conditions?

carminegnu677

Biology 2483A Lecture Notes - Lecture 5: Trophy Hunting, Krill, Adaptive Radiation

Document Summary

Get access

Related Documents

Biology 2483A Lecture Notes - Lecture 5: Disruptive Selection, Antimicrobial Resistance, Bighorn Sheep

Biology 2483A Lecture Notes - Lecture 5: Disruptive Selection, Sympatric Speciation, Guppy

Biology 2483A Lecture Notes - Lecture 5: Antimicrobial Resistance, Honey Badger, Filter Feeder

Related Questions