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1answer
36 views

Examples of points in evolution where two species stopped being interfertile? [on hold]

Apologies in advance for not using the right terminology here; I'm not a biologist. This isn't for homework or anything; just curiosity. I'm wondering: at what point do two divergent species stop ...
3
votes
1answer
138 views

How to find out the when we had a common ancestor with a particular animal

For example, Jordan Peterson claims that human and lobsters have a common ancestor X million year ago. I wonder, how does he know it? I'd be so delighted to visit a website, where I could select two ...
3
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4answers
129 views

Can the theory of natural selection distinguish between two correlated phenotypic traits?

Consider the following two situations: A species X has trait $T_1$ that is gradually selected for by some characteristic $E_1$ in some ecological niche but it turns out that the genes for $T_1$ also "...
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2answers
106 views

Does evolution only give rise to traits that confer fitness?

Does evolution only give rise to traits that confer fitness? In other words, does the existence of a trait imply it's conferring of fitness? If not, what are some counter examples?
2
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2answers
101 views

Basener's ceiling and evolution

There is a theorem in the Intelligent Design literature called Basener's ceiling. It states that all evolutionary algorithms that attempt to optimize some fitness function will eventually reach a ...
0
votes
1answer
230 views

Is Race the Result of Microevolution

I've been studying evolution for some time and was wondering whether the emergence of different races is an example of micro evolution within our species? Bonus Question: is it impossible for homo ...
1
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1answer
55 views

How do similar environments on islands in close proximity result in allopatric speciation?

I would like to ask a question on the very classic example of allopatric speciation seen in the Galapagos finches. Adaptive radiation occurred because the finches flew from island to island, so there ...
3
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0answers
87 views

The mechanism of the evolutionary rate hypothesis

There are several hypotheses for explaining the latitudinal gradients in species diversity (link). Of which, the evolutionary rate hypothesis states that warm temperature increases the rate of ...
1
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1answer
121 views

How does mutualism arise? [closed]

How can a mutualism between two species arise? I have thinking about this for a while and I have come up with the following points 1.If mutualism gives one specie a competitive edge over its ...
0
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1answer
131 views

Is there a difference between macroevolution and group selection?

I encountered two different attitudes towards macroevolution: The first one included long-term microevolution such as the evolution of Cetacea. The second one included only macroevolution in terms of ...
2
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1answer
66 views

Is the birds' decision to fly away congenital or learned behaviour?

I see two possibilities how could the birds know what to do every fall: The birds' migrations are driven entirely by the vertical memetics and today it is just a custom transferred from parents to ...
-2
votes
1answer
380 views

Approaches towards a theory of innovation in evolution

Evolutionary biologist Andreas Wagner writes in his book "The Origins of Evolutionary Innovations: A Theory of Transformative Change in Living Systems" (Oxford University Press, 2011): We are ...
1
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1answer
35 views

How to incorporate intraspecific variation in discrete characters in comparative analyzes?

I'd like to run a multivariate analysis (Pavoine et al. 2011) that aims to disentagle the effect of environmental gradients on traits, considering its autocorrelation with phylogeny and space. It uses ...
1
vote
1answer
132 views

Evidence of species transitions [closed]

I had a debate with a person who believes in some kind of creativism, let's call it that way. And in the middle of the "debate", an interesting question popped up. What are evidences of "...
0
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1answer
60 views

Biological Evolution outside of Earth [closed]

What drives evolution forward? I heard that climate change drives species to evolve and adapt. Is there any other mechanism that is encoded in our DNA by which species can over abrupt changes, evolve ...
1
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0answers
263 views

How did the double circulatory system evolve from the single circulatory system

I already learned how the mammal circulatory system (double circulatory system) evolved from the reptilian circulatory system. How did natural selection evolve the reptilian circulatory system and the ...
-3
votes
2answers
314 views

Driving force for speciation for millions of species today

I would like to know if speciation really occurs (trans-speciation). Have we had enough time for millions of species? A creationist argument is that the slow changes in traits in organisms, taking ...
1
vote
1answer
551 views

What is variation in Speciation

I read a lot about speciation. To my knowledge, a species is often defined as a group of individuals that actually or potentially interbreed in nature and produce fertile offspring. Speciation is a ...
6
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1answer
93 views

Evolution of diversity and extinction resistance

I saw a comment on an answer to another question that touched on an interesting topic: keeping diversity is useful for parameter exploration or to adapt to future environmental change My initial ...