Evolution refers to the observed changes in successive generations of biological organisms due to heritable components (genes and DNA). Charles Darwin proposed a major mechanism of evolution: natural selection.
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Can this theory on the evolution of human appearance be flawed?
This is what a friend of mine said:
When there's human offspring, it will look a rough 'medium' between
the two parents, with it sharing features from the two. well if the
offspring of one set ...
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Zero selection in evolution
The evolution is creative because of random-generated solutions and useful because only best solutions are selected. The natural selection not only brings species to perfection but also keeps them ...
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Is there any evolutionary/physiological advantage to multi-lateral symmetry?
Just wondering ; I get the impression a large number of multicellular organisms are multi-lateral in their physical structure. Why would evolution/mutation have retained multi-lateral symmetry in an ...
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138 views
Why have humans evolved conciousness?
Why did humans/animals evolve to become self-aware of their own thoughts. That is, why don't humans act and compute like a machine, or walking zombie. In my mind, such creatures would still be as ...
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58 views
Lineage selection in plasmid evolution
I've been reading through Paulsson (2002) and I am not sure what he means by "lineage selection" in the second to last section. The paper deals with plasmid replication, and mostly concentrates on the ...
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Why does the PR form of phytochrome exist?
I know how it gets converted because PR is more stable and when there is neither red or far red light PFR naturally converts to PR. But what is the point of it? If PFR is the biologically active one ...
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124 views
From which ancestor species did humans inherit orgasm?
From what ancestors did humans inherit orgasm?
Do fish experience orgasm?
Are the male and female orgasm the homologues that can be traced to the time when there was no difference in sex between ...
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112 views
What is the similarity between how cells organize themselves to form a human and how humans organize themselves to form a society? [closed]
Some things I have gathered.
Common properties
- individuals
- communicate
- local view
- selfish
- specialize
- organize
- replicate
- cooperate
- emergence
Terminology
cell ...
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What's the Evolutionary Purpose of Hair in Humans (namely the hair that grows on their skin, NOT internal hairs)? [closed]
My guess would be the following four:
Protection from the cold (especially head hair)
UV light protection (especially head hair but hair elsewhere would also protect from UV light in times when ...
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Why aren't antheridia and archegonia touching?
Antheridia and archegonia are the two male and female gametangia, respectively, and they are found in bryophytes. To cause fertilization, usually a thin film of water must be present for the sperm ...
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Plants without bacteria? is it theoretically possible?
I know from school, that all live on the Earth need bacteria as low-level "machines" that break down/extract/convert/produce chemical elements and combinations, other high-level organisms needed. But ...
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why do organisms die [duplicate]
Possible Duplicate:
What is the evolutionary advantage of death?
From an evolution perspective, it makes more sense that the organisms which live longer, obviously, survive longer.
So why ...
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Resources for learning Anthropology [closed]
I'm a programmer by profession and passion. I've been interested in biology, especially regarding evolution in school. Now I would like to learn Anthropology in my free time. Can you point me to some ...
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A question regarding evolution
I'm not a biologist so bear with me. I know that the DNA molecule carries extremely large amounts of information. If the process of evolution is driven by completely random process .I think about it ...
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What was behind the evolution of human brain? [closed]
Why did the human brain evolve!?
certainly it was not selective evolution, it seems something inside DNA forced human to evolve through brain
Evolution (or development process of human) is more ...
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180 views
How To Avoid Macro-Evolution Confusion? [closed]
I regularly encounter students who believe humans came from amoebas and when asked why they often say Macro-Evolution has been scientifically proven.
Macro-evolution is defined as evolution at or ...
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178 views
Why hasn't mother nature made us aware of our lizard brain? [closed]
In many personal improvement books I've read, people make a distinction between 2 parts of our brain:
the logical brain, dealing with logic, judgement, thinking; what makes Humans different than ...
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I believe in variation of a species but not in evolution [closed]
I can see that variation within species exists, for example birds with various size beaks adatpted for specific food gathering puposes, one may have a larger beak vs smaller beak, ok that works for ...
