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Sure it's convenient to decide when to urinate but notessential for survival or reproduction, as I understand.But just convenience is not a drive for evolution.

Does the bladder serve any essential purpose? If not why didbladders evolve?

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Trinidad Tremblay
Trinidad TremblayLv2
3 Jan 2018
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Related questions

I was just reading Evolution of lactose tolerance, and in it oneline says "But there was a time in human history when our diet andenvironment conspired to create conditions that mimicked those of adisease epidemic".

Something I've always wondered is rather than natural selectionoccurring and survival of the fittest and so on, is that a viralepidemic caused a mutation in the survivors, i.e. DNA was insertedfrom the virus that modified the survivors genome. There is someevidence that a significant percentage of the human genome comesfrom viruses. Probably a naive question - so is there any evidencethat this has occurred? From my lay perspective this is whatattempts at genetic engineering use, so it's possible naturealready did this?

It's always seemed to me that natural selection and pointmutations, and the chance meeting of two people with the samemutation would be too slow and viruses would be a more efficientmethod to evolve a large population at the same time. Things likepunctuated evolution might support this? not really sure.

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 “survival of the fittest”? 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.

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 “survival of the fittest”? 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?

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