Questions tagged [evolution]

Changes in the heritable attributes of populations of organisms over time. The mechanisms of evolution are mutation, migration, drift, and selection.

Filter by
Sorted by
Tagged with
0
votes
0answers
17 views

How would evolution explain parastitic wasps? [duplicate]

I read this article about wasps that can do "brain surgery" on cockroaches. https://www.wired.com/2014/02/absurd-creature-of-the-week-jewel-wasp/ How does evolution create such a thing? The brain ...
1
vote
0answers
32 views

Why such diversity in sexual dimorphism in passerines?

In searching for info to answer my question, I’ve found a fascinating 1998 article by Owens and Hartley from Proc. R. Soc. Lond. B. It reports such cool findings as that When we break up plumage-...
0
votes
0answers
17 views

Definition of “genomic adaptation”

I have encountered the term genomic adaptation in some literature (for example Sikkink et al. 2017). I am struggling to parse the term, and I have not been able to ...
1
vote
2answers
87 views

Clarification regarding a statement in “The Selfish Gene” by Richard Dawkins

In the third chapter of The Selfish Gene: Immortal coils, Dr.Dawkins makes the following statement while arguing for the case that ultimately "the gene" as he defines it is the unit of natural ...
0
votes
0answers
16 views

Lineage inference based on N randomly partitioned copies of a gene

I am interested in reconstructing cell lineages based on the sequences of randomly partitioning plasmids. I can find lots of models to build lineages based on a single sequence (e.g. bacterial gene) ...
1
vote
0answers
16 views

(Soft) Lay Survey of human natural history

I am looking for an introduction to the natural history of humans. I had originally thought Sapiens until I found out it is more a history and archeology book of dubious scientific accuracy. The Sorts ...
1
vote
0answers
63 views

Why do vertebrates have an oesophagus?

As far as I know, the oesophagus in vertebrates has no digestive or absorptive function. It is simply a conduit from the mouth to more distal parts of the gastrointestinal tract. Why have it at all, ...
0
votes
2answers
37 views

How verified experimentally is the Marginal Value Theorem for viruses?

Reading some Stanford notes on R0, they get to MVT and optimal virulence: Consider a directly-transmitted infection from which there is no recovery (e.g., Herpes Simplex). The population ...
0
votes
0answers
13 views

Measuring the efficiency of different forms of Sociality in animals?

I was looking to the behaviour of hives and colonies and was wondering if there is a way to measure the efficiency of different forms of sociality in animal groups. This measurement should include how ...
1
vote
1answer
56 views

When did bison exchange smartness for larger skeletal muscles or a digestive system that can ferment grass?

Patricia Churchland (2019) writes: From time to time, evolution favors a dumbing down; sacrifice some smartness in exchange for larger skeletal muscles, like bison, or for a digestive system that ...
-3
votes
1answer
43 views

Which is more evolved Rays or Sharks

I know the Theory of evolution explains that life transforms to become more complicated, sophisticated so that it's more equiped for survival, Just like the survival of the fittest, the fittest are ...
1
vote
0answers
29 views

An online tree of life with extinct species present?

There are awesome online phylogenetic trees such as OneZoom. But they all only list living species. I want to see dinosaurs between birds and crocodiles. I wanna see that humans are reptiliomorphs ...
0
votes
1answer
88 views

what is “a group of living things that can interbreed and produce full interfertile offspring”?

lets call this term "collection" Example: group of humans. what is not a "collection" horses and donkey: can't produce full interfertile offspring, lions and tigers: can't produce full interfertile ...
-2
votes
2answers
29 views

which specific field to study to know more about genes and genomes [closed]

I recently got interested in specific subjects : 1.Evolution 2. DNA, genomes etc and its structure 3. Abiogenesis I am a software engineer with good fundamental understanding in math & physics ...
-1
votes
1answer
60 views

Can there be significant new changes in physical features of Humans due to evolution in 10000 years of span? [duplicate]

Humans migrated from Africa about 60000 years. And in these years humans physical features undergone significantly in terms of skin color, hair, eye color and facial features. So, with this we can ...
1
vote
3answers
83 views

Technologies that rely on evolution [closed]

It's possible that this is offtopic here; if so, please let me know. I'm wondering what technologies exist that rely on evolution being a correct model; I'd like to be able to offer examples of that ...
1
vote
0answers
49 views

Why do some mammals have incomplete orbits?

I've noticed that a lot of carnivorous/omnivorous mammals (most, if not all the members of carnivora and some ancestral cetaceans), as well as some herbivores (marsupials), have incomplete orbits that ...
-2
votes
1answer
59 views

Why is it that evolution of organisms had oxygen as their life-supporting gas?

On Earth, gaseous N2 is abundant. However, life began by dealing with O2 and CO2. What can be considered the major reason for life developing in such manner?
1
vote
1answer
38 views

What does it mean for a species to be ancient?

When we say that a species like cockroaches is ancient, what does it mean exactly? Does that mean that cockroaches haven't evolved for a long time? But isn't evolution always occurring? So is that ...
0
votes
0answers
20 views

Are there any organisms that do not perform glycolysis (or anything similar)?

To clarify I know that there are alternative pathways similar to glycolysis, what I mean is are there any organisms that perform a different pathway that is radically different from glycolysis, but ...
1
vote
0answers
48 views

Is it impossible for some female songbirds to sing?

I have read that in northern hemispheres, most female songbirds can't sing (for example, the Blackbird). Things are different in tropical regions. Birdsong is for males in some species; it is utilized ...
2
votes
2answers
37 views

What was the evolutionary benefit of enclosing hemoglobin in cells?

The ancestral solution to oxygen transport is with hemoglobin (or, similar proteins) dissolved in blood (or, "hemolymph", but, basically, dissolved in water. ) What was the advantage of enclosing the ...
5
votes
0answers
27 views

Do animals have greater tendency to care for their opposite sex siblings due to mate competition among same sex siblings?

According to the gene-centered view of evolution, siblings have p=1/2 relatedness, thus having greater altruism between them than cousins or unrelated animals. For species with a conventional sex ...
0
votes
2answers
24 views

What is the meaning of a selection regime in this context?

"Our second approach was based on modeling adaptive regimes across a phylogeny for each of the groups in our study using an OU model. We especially focused on the lineage leading to humans, and tested ...
1
vote
1answer
57 views

Why/How do Cyanobacteria Produce Toxins?

I've been doing some research on the versatility of nitrogen-fixing cyanobacteria, particularly of the genus Anabaena, and I often run into safety hazards and have to add extra steps to my procedures ...
0
votes
1answer
35 views

Is it true to say that the more an organism is smaller, the faster it's going through evolution?

As someone who never formally learned biology, I assume that currently; The number of species of (non Archaea) Bacteria The number of species of Algae The number of species of Plankton The number of ...
6
votes
1answer
135 views

If rabies always kills its hosts, must there be some animal that is an asymptomatic carrier?

I searched a lot on the Internet, but I am not clear about the spread of the rabies virus. As I understand, rabies kills any animal it infects—cats, dogs, foxes, bats, humans. If it kills all of its ...
0
votes
0answers
14 views

Function of the mesentary in segmented worms?

The mesentary that appears at some phyla at some point in evolution, initially, what exact function does it have?
0
votes
0answers
9 views

How do pseudo-coelomates solve what the mesentary later evolve to do?

Pseudo-coelomates have evolved a coelom, but, lack the mesentary. How do they solve what the mesentary evolved to do?
0
votes
0answers
14 views

Is the primitive streak homologous with the archenteron?

Embryogenesis follows different stages across the animal phyla, monoblasts, diploblasts, triploblasts, chordates, and I have a hard time wrapping my head around exactly where they all relate in terms ...
2
votes
1answer
55 views

Did bilateral symmetry evolved just once?

If I understood correctly, all bilaterians come from a single organism (the Urbilaterian) that showed this type of body plan for the first time at the end of the Ediacaran. Does that mean that ...
1
vote
1answer
158 views

Temperature to kill virus

Why do I see only high temperature advice to kill microorganism, and not low temperature? Why isn't there any low temperature which kills virus? Are they more resistant to low temperature?
0
votes
0answers
25 views

Radial symmetry and evolution of gut tube

It seems like gut tubes are usually said to have evolved with bilateral symmetry. A tube though is just a cylinder with radial symmetry, and technically, it seems like radial symmetry should suffice (...
1
vote
1answer
87 views

Why are smaller mammals more prone to cancer and tumors

especially rats and mice usually develop cancer and tumors very fast, reducing their life expectancy. From an evolutionary point of view, how come that these mammals are so prone to cancer and tumors ...
1
vote
1answer
103 views

Why does it take so long for the human brain to develop from an evolutionary point of view?

I have read that it takes about 25 years for the brain to be fully developed. Coincidentally, humans from the Neolithic and Bronze Age had a very short life expectancy, in fact most of their life ...
8
votes
1answer
3k views

Why might long telomeres be selected for in laboratory mice?

In a recent episode of The Portal, Eric Weinstein sits down with his brother Bret Weinstein to discuss Bret's Reserve-Capacity Hypothesis. It's an incredible story of scientific discovery and and ...
0
votes
0answers
52 views

Evolutionary relationship between liver and spleen?

based on bilateral symmetry, and how embryonic programs work (simple patterns initially, then specialization), for example somitomeres, do the liver and the spleen, that bilaterally occupy the same ...
4
votes
0answers
55 views

Why is the coremata of Creatonotos gangis huge?

This Australian moth has been some kind of curse image online due to its scent organs (coremata). It is inflated to attract mates. However, why does the coremata have to be inflated for it to work, ...
-1
votes
1answer
88 views

Is the backward positioning of photoreceptors bad design?

(Several questions have been asked about this topic but most are quite old and there has been at least one study since then that has attempted to answer this in a new way) Since photoreceptors are ...
0
votes
0answers
48 views

Research on chicken that cannot feel pain

In was having a conversation about the ethics of vegetarianism, and if it is right to cause pain to other animals. It is then that I stumbled upon the question, that if, just the way chicken and many ...
0
votes
2answers
146 views

Examples of healthy lifelong asymptomatic carrier of a severe infectious disease?

I am curious, is there any known disease/infection that is very severe normally (patient suffers greatly and die easily without medical treatment), but ends up having little to no effect on the lives ...
-1
votes
2answers
64 views

Does technological developments terminate the evolution of human species? [duplicate]

One of the most agreed upon mechanism for evolution is natural selection.Changing environmental conditions necessities development of variations that enable the survival of that particular species....
2
votes
2answers
140 views

Did any warm blooded animals evolve back into cold blooded?

Pretty much as title says - wondering if evolution can go from mammal back to reptile - either in theory or practice.
0
votes
0answers
45 views

Is there more biomass on earth today than there was in the past?

Is there more, (or less) matter on earth sequestered as a part of biological systems than there was at any(arbitrary) time in the past? Edit: I realise I don't have a specific question, and was ...
-1
votes
2answers
121 views

Will all bacteria become resistant against all antibiotics in the long term?

(I asked the same at medicalsciences beta, but I expect a quite different perspective on it here) This is about bacteria that can infect humans, and their multi-resistance. The evolution of bacteria ...
-1
votes
2answers
54 views

Have we found any other life form outside our planet?

I'm not asking about the possibility of formation of life on other planets instead has there been any real evidence of life(such as micro organisms or even very basic structures) that might suggest an ...
2
votes
1answer
44 views

Evolution history of virus tracing

How do biologist trace evolutionary history of virus, is there any article on this issue, e.g. how scientist got to know that coronavirus evolved from bat or camel or pig?
1
vote
1answer
68 views

Will the sex ratio of chickens become favourable to females?

As male chickens are killed after birth in mass farming. Will being male become a negative evolutionary trait, that is to say will females become more likely as male death is more likely.
1
vote
1answer
58 views

What does it mean for there to be no correlation between phylogenetic independent contrast?

I am testing the correlation between two physiological parameters in plants using the pic function in R. I am a bit stuck on the interpretation of the phylogenetic independent contrast (PIC). Without ...
0
votes
1answer
38 views

Is the frequency at which a species mutate affected by natural selection? [duplicate]

As per natural selection, is it safe to assume that some species will have it genetically encoded so that they produce a certain 'perfect' rate of mutation so that they can adapt to an environment ...

1 2
3
4 5
42