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Questions tagged [adaptation]

Adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation.

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4
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2answers
268 views

Do Traits Have to be Adaptive in Order to Survive?

I'm reading Michael Pollan's book 'How to Change Your Mind', which is largely about psychedelic mushrooms. In discussing the biology of the mushrooms, he writes: 'Even if psilocybin in mushrooms ...
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2answers
42 views

What's the difference between reaction norms and phenotypic plasticity?

I'm trying to understand better these two concepts, but I cannot see a clear difference yet. Reaction norm: "set of phenotypes that can be produced by an individual genotype when exposed to different ...
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1answer
85 views

Is evolution theory falsifiable by whether mutations result in a loss or gain of genetic information? [closed]

If I understand the theory correctly, evolution revolves around the process of adaptation of a being to its environment which results in the increment of survival and reproduction chances for that ...
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2answers
74 views

More general term than “adaptation”

The Wikipedia article about adaptation states: Adaptation differs from flexibility, acclimatization, and learning. What is a more general term than adaptation? For example, is there an umbrella ...
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0answers
15 views

How does salt content affect flowering of halophyte?

My teacher told me that one adaptation of halophyte is that they flower at specific time e.g. rainy season to reduce salt exposure (as salt content affects flowering of plant thus affect the ...
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0answers
30 views

(secondary) human/primate advantages over other animals? [closed]

I am trying to understand the advantages that humans have over other species, besides what you could call 'sentience-critical'. What I mean by this is, the first set of answers you'll get is "more ...
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1answer
76 views

How do longleaf pine trees adapt to the florida keys rainforest? [closed]

I know that longleaf pine trees can be found in rainforests, but I can't find anything.
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1answer
52 views

insect paralysis in response to predator echolocation frequency

I remember a case in which some insect had evolved an adaptation in response to a predator's (bat's?) echolocation frequency. In mid-flight, it's wing muscles would become paralyzed and it would ...
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1answer
855 views

What kind of owl does this moth look like?

I found this moth and I noticed that it looked like an owl to me and remembered something about how some moths camouflages look like predictors? What kind of moth this is and what owl does this moth ...
2
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1answer
97 views

Are we evolving as fast as the oxygen is depleting?

How much oxygen saturation have we lost in the last 100 years? As oxygen levels dwindle and industry, deforestation, and population increases, at what year and saturation will the low levels of ...
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1answer
83 views

What is the adaptive significance of temperature dependent sex determination?

Why do some reptiles have TDSD ? Is it because one of the genders is healthier than the other that only they, can survive high temperatures?
2
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1answer
104 views

What to call a trait that has current utility but unclear evolutionary origin?

I'm looking for a commonly used term to describe a trait that has clear current utility but an evolutionary origin that is uncertain and that we do not necessarily wish to emphasize in our description ...
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51 views

What natural defence mechanism does the human body have against lead poisoning?

It is known that lead ion takes place of necessary ions, like calcium, in the body, but does not perform their task, hence wrecking the system. So how does the body eventually recognise this threat ...
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1answer
10k views

Why does my room suddenly look 'reddish'? My eyes seem to adapt to color

To get the context of this question clear, I would like you to walk through some parts of my house. We'll start with one of my rooms as it appears normally - As evident, this part of my house has a ...
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1answer
58 views

Do similar adaptations result in similiar genetic code?

Sometimes organisms within the same species evolve similar adaptations to similar living conditions without interbreeding. Let's say we have two human populations which need to adapt to a colder ...
3
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1answer
157 views

What of Gould's contributions to evolutionary biology are still accepted in the mainstream?

I have been reading Daniel Dennett's Darwin's Dangerous Idea, in which he picks apart many of Stephen Jay Gould's criticisms of neo-Darwinism, particularly in the chapter 'Bully for Brontosaurus'. ...
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2answers
409 views

How can just random mutations explain mimicry? [closed]

I have been reading this article on drug resistance which explained that how random mutations in a bacterial colony can lead to development of drug resistance among some organisms in that colony. A ...
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1answer
64 views

What is this passage trying to say about Darwin's difficulty in explaining variation?

This passage, from the book "How humans evolved" by Robert Boyd, says that one of the problems Darwin had at the time was that he struggled to convincingly explain how variation could be maintained; ...
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0answers
261 views

How do migrating geese handle hurricanes?

I live on the East coast of the United States, where we are in hurricane season. This week during my morning bike rides in Charlotte, North Carolina, I have seen migrating Canadian geese. I'm curious ...
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Why do humans grow taller than their ancestors?

I'm taking the Introduction to Genetics And Evolution course and in the first lecture it was said that: Evolution in a biological sense is simply a change through time. And very importantly, that ...
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1answer
788 views

Can a human increase cold resistance through some practice?

Can cold showers, moderate underdressing in cold weather increase your cold resistance? What is responsible for cold tolerance? It's physiology/psychology or it's genetic thing? By increasing cold ...
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0answers
38 views

Does Batesian mimicry rely on constant reinforcement?

If the species being mimicked, the monarch butterfly, for instance, were to become extinct, would the species mimicking it loose all of the benefit gained by their Batesian mimicry immediately? I ...
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1answer
582 views

Excessive sweating in dry heat [closed]

It's pre-monsoon season here in India. The temperatures in the Northwest of the country really take a spike around mid April. Apparently the heatwave-like conditions seem to have announced themselves ...
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0answers
516 views

How do coyotes remove cactus needles from their paws?

Here, in Arizona, coyotes roam and hunt in the desert. While hiking with dogs, I often see spiny bits of Teddy bear cholla cactus on the ground. Dogs often step on these and get stung by the ...
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61 views

Which organisms require the least fluctuation in ambient temperature?

Note that I am NOT asking "which organism can survive the most extreme temperatures." Many extremophiles like the tardigrade can survives extreme heat, but also extreme cold. Many heat adapted animals ...
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0answers
92 views

What makes delayed onset muscle soreness stop occurring?

If someone lifts weights or takes a long jog after not doing it for a while, they can experience delayed onset muscle soreness (DOMS). However, when they return to the same exercise days afterwards, ...
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Why is reducing the amount of detail required to remember the location of an object in one's environment adaptively significant?

In Campbell's Biology Chapter 51, question 36 reads: Which of the following shows the adaptive significance of cognitive mapping to animals that employ this type of learning? A) It ...
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1answer
4k views

Why Lungs can't work in water and gills can't work in air? [closed]

Animals-with-lungs (such as most terrestrial mammals) cannot continue breathing if merged in water, and soon die. Whereas fishes can breathe in water (at least for few-hours in case of some fishes ...
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Adaptation by standing genetic variation and fitness variance [duplicate]

I've read a couple of paper on Fisher's Fundamental Theory of Natural selection that states: $W(t+1) = W(t) + Var_{W}(t)$ Given a population with some degree of genetic variability, and assuming that ...
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2answers
3k views

Why aren't there any transitional animals today?

You have probably heard this question before and in different formats. Usually, it is used as a "proof" to disprove the theory of evolution. I understand that the apes we descended from are not the ...
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2answers
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Do any terrestrial herbivores use auditory crypsis for predator avoidance? [closed]

Some terrestrial predators "stalk" their prey: they sneak up on it slowly, maintaining a low profile, while keeping as close to silent as possible. This makes sense from an evolutionary perspective: ...
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1answer
4k views

What is the difference between natural selection and adaptation?

From what I've read it seems that the only actual difference is that creationists use adaptation and people who believe in evolution use natural selection. But otherwise, from my understanding, the ...
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1answer
1k views

What are Some Classical Examples of Local Adaptation?

Question Can you please give a list of classical (textbook) examples of local adaptations? How to answer Examples don't necessarily need to include what evidence supports this specific example of ...
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1answer
1k views

A question regarding trichomes in plants

Trichomes in general are features of xerophytic leaves, which reduce water loss by evaporation by trapping water vapor and increasing humidity (as a result lowering the water potential gradient). BUT ...
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Did the number of rods changed from ancient time?

Correct me if I am wrong, but I know that rods work under limited light conditions only. But now we are in a world that always have lights everywhere unlike ancient time when humans had to deal with ...
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2answers
223 views

Is addiction adaptive?

Addiction and addictive traits seem common amongst animals. A pubmed query shows it's been studied in everything from humans to worms. My personal favorite of these is: "Individual Consistency of ...
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1answer
30 views

Good model for comparative genomics in relation to temperature adaptation

Can anyone suggest any highly related bacterial or parasitic species which live at very distinct temperatures, which might be a good model for comparison of genomes in regard to temperature adaptation....
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1answer
1k views

Do lunar rhythms have really impact on plant growth?

It is commonly known that lunar rhythms have influence on plant growth, and there are even lunar calendars to know when planting, pruning, transplanting, harvesting, etc. I know that the lunar cycles ...
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0answers
401 views

Bergmann's rule and Allen's rule: endotherms and ectotherms

Surface area to volume ratio (in terms of heat conservation) is not the only mechanism, but it is still an important mechanism for explaining Bergmann's rule and Allen's rule. Given that, I want to ...
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8answers
16k views

Why do some bad traits evolve, and good ones don't?

If a trait would be advantageous to an organism then why hasn't it evolved yet? Conversely, if a trait is not advantageous or mildly disadvantageous, why does it exist? In other words why does ...
5
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1answer
546 views

The ermine's colour and geographical range

Ermines turn white during the winter, with only the tip of the tail remaining black. However, in the southern regions of the ermine's range it clearly doesn't get so white. Encyclopedia of Life says ...
5
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1answer
81 views

Can nociceptors die because of too much mechanical stress?

In martial art people hit their body (e.g., with small bean bags) to become more insensitive to pain. Can the sensory neurons die during this procedure? I think this is just an urban legend. Instead, ...
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1answer
240 views

Is Batesian mimicry more important for females?

Myrmarachne plataleoides is a jumping spider that mimics the Kerengga or weaver ant (Oecophylla smaragdina) in both morphology and behaviour. However, the two sexes appear different: Myrmarachne ...
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0answers
1k views

Why is Pilobolus phototropic?

Pilobolus is a fungal genus whose fruiting bodies consist of a stalk ending in a spore mass that is launched via turgor pressure to disperse the spores. The fruiting bodies grow towards light, which ...
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1answer
640 views

Sensory adaptation regarding smell and hearing

Imagine the scenario. My friend and I are playing a game of chess near a highway. Initially, I notice the sound of the highway. While I'm playing chess, however, I do not notice it. After the game my ...
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1answer
70 views

How to evolutionary explain menstrural cycles synchronization? [closed]

Sorry, I can not indicate the source, but I read that menstrual cycles of women who live in the same house over time sync. Is it true? How does it work?
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1answer
332 views

What is the progressive evolutionary advantage that leads to flying?

As far as I understand, all life started as non-flying and flying came about by natural selection. What is the evolutionary advantageous "path" to flying? Or is there something else to explain this?
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1answer
95 views

Does sociality evolved before or after the ability of motility?

According to book Life Ascending: The Ten Great Inventions o Evolution. (Lane, N.;2010), Motility has indeed transformed life on earth in ways that are not immediately apparent, from the ...
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2answers
405 views

Definitions of robustness and canalization

The concepts of robustness and canalization are fashionable today in the biology literature. However, I am not sure of their definitions and I am not sure either that all authors actually use the same ...
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0answers
210 views

Among xerophyte plants, which one grow faster and consume water the least? [closed]

In an effort to select for the most suitable plants to possibly colonise desert and stop its expansion, what would be the xerophyte plants that grow the faster and expand on surface, while using the ...