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Evolution
The scientific theory according to which populations change gradually through a process of natural selection.
5,264 Questions
What change occurred in Earth's atmosphere after the evolution of photosynthesizing prokaryotes?
The rapid rise of atmospheric oxygen illustrated in the geological record by layers of iron oxides.
What happens when Rare allele is in a small population?
The smaller the population the greater the frequency the allele will increase. When the Old Order Amish came to America in 1744 it was a husband and wife. One of them was a carrier for a recessive genetic mutation. As time went on and inbreeding occured because of the small population more and more children were born with the genetic disorder.
Do organisms evolve slowly over time and can two different organisms have a common ancestor?
Yes they evolve slowly over time and a panda and raccoon have common ancestors.
Miller and urey's experiments attempted to demostrate?
Miller and Urey's experiments attempted to demonstrate the chemical origins of life. They first conducted the experiment in the year 1953.
The similarity of sheep and reindeer is due to parallel evolution. This is when two species have a common ancestor and have developed similar traits, despite living in different areas.
For humans, a motor skill that is common among all cultures.
Answer 1
Evolution is not a process that can be reversed. The core principle behind evolution is that traits with a positive impact on survivability or reproduction tend to passed on to subsequent generations. Evolution itself is merely the slight alteration of a species gene pool over many generations. Perhaps you can see that the question "Is evolution reversible is something of a misnomer. Is the process by which you change something reversible In certain processes the thing that is changed can be returned to its original state, but this process also requires change. If you intended to reverse an evolutionary process the only way you could do so would be through evolution. This type of process has no non-reflexive logical inverse.
Perhaps what the question intended to ask was whether a species could "revert" back to a "less evolved" state. An example to explain this would be the reversion of humans to a more apelike genetic structure. This is certainly possible. If traits that were more apelike positively impacted the survival rate or the reproduction rate of the humans that had them than humans would begin to evolve to become more and more like our simian ancestors.
Answer 2 : There are certain examples of reversal in evolution .Most familiar trend can be seen in evolution of Dinosaurs which were of small size in Triassic period , evolved to maximum size in Jurassic period ,and again decreased in size in Cretaceous period .
Answer 3: The process of Evolution doesn't have a "direction", it doesn't favor one type of organism or trait as being "higher" than another. So in a broad sense evolution simply goes where environmental conditions dictate, there's no backward (reverse) or forward.
Could traits that were once non-adaptive reappear in a population if environmental conditions changed to make them adaptive again? Yes
Can an individual organism reacquire older traits that were not part of it's original genetic makeup? No
Do some older traits occasionally reappear in vestigial form in some individual organisms. Yes (there are instances of humans being born with a short tail etc.)
Answer 4
Evolution is basically a stochastic phenomenon. In order for evolution to "back-track", every single change in the genome that had occurred would have to be reversed in the exact reversal of the order that they occurred in. This is so extremely unlikely to ever occur that, were it observed, we would have to conclude aliens were pulling our legs.
But although evolution is not reversible, it is possible for traits to evolve a similarity with an earlier form. Consider for instance the fish-like shapes of whales: they evolved from land-dwelling mammals, which in turn can trace their ancestry back to early fish. Same shape, completely different genetics.
Answer 5
If you cloned an extinct animal, it might count as evolution going backwards. Not sure about that though, cause it's a pretty philosophical question.
What is a factor is not a strong piece of evidence for evolution?
C)
Many traits of modern birds resemble the fossils of winged dinosaursC)
Many traits of modern birds resemble the fossils of winged dinosaursWhat is non random association of alleles at two or more loci?
Allele association.
Linkage disequilibrium- measure of correlation in allele frequencies between two loci.
Non-random association indicated linkage disequilibrium while random does not.
1) Offspring vary slightly from their parents
2) More offspring are born then resources available
3) This competition selects for the more fit to survive and reproduce due to the traits they inherited.
4) The more fit breed and give rise to offspring that inherit some of the parental traits.
This cycle is the process of evolution, in my own words
Why did Darwin disagree with lamarck?
}Firstly, Lamarck reckoned that variation depended upon environmental factors of which frequently invert and alter throughout life's course for all sorts of organisms: the analogy of giraffes neck lengths determined and supported his argument in both further, quantity and greater profitable detail, on Lamark's behalf, because when they were alive, then passed this irregular measured feature of the neck which evolved and developed over thousands of years hereditarily through generations.
As opposed to this initial objective- the Darwinian theory determined that evolution occurred through natural selection and specie categorisation. Essentially, this exemplifies the survival of the fittest, where those more adapted and aptly suited to their naturally habilitated environment survive and procreate these environmentally developed gene copies to their offspring, valuably...
Furthermore, a mutation or variation in a species may possibly allow these two opposing theoretical arguments to familiarise briefly in some points and objectives made about each theory.For instance, "if there was a pig and a giraffe in a pen with only one tree, the giraffe would survive, whereas the pig would have no means of getting food so would die".
How does fossil evidence support the theory of evolution?
They tell you what lived in the past and when,
Why Darwin could not answer all the questions regarding to his new theory?
He didn't, that's why only accepting evolution as the only option of how the heck we are here is irrational
____
Darwin was a scientist and as such understood that theories evolve as more information comes to light. He knew he didn't have all the evidence and as more came to light his theories would change accordingly. He was building on the work of others who came before him and knew later scientists would contribute their unique insights.
People think that the theory of evolution is a closed book with nothing else to contribute. And because the theory doesn't explain every single aspect of evolution, and that there are gaps in our current knowledge, that it is completely wrong. Science is alive, it changes and updates with new knowledge.
Meiosis takes place in sexual reproduction and genetic variations takes place in sexual reproduction. Genetic variations lead to evolution to new species.
What theory proposes that species evolve during short periods of rapid change?
punctuated equilibrium
How horses have changed over time?
Horses have come a long way from the three-toed, dog sized prehistoric animal they once were. Todays horses are taller and by most accounts better looking, with many different breeds to choose from.
How might evolution theory account for this phenomenon?
Evolutionary theory can account for the phenomenon of a new species. This is because different species can evolve from a common ancestor.
Why did birds evolve after reptiles?
Because they can generate their own body heat - reptiles cannot and need a warm environment
Why does evolution require diversity within a species?
If everything is exactly the same, there is a lower chance of evolution occurring; diversity is not necessary, but it works quicker. This is because where random mutation is the only thing to introduce wider genetic diversity, it will take a longer time than simply mixing the gene pool up.
What is the matter with the earth?
The Earth is facing a range of environmental issues such as climate change, deforestation, pollution, and loss of biodiversity. These issues are largely caused by human activities such as burning fossil fuels, deforestation, and industrial processes, which are leading to significant changes in the Earth's climate and ecosystems. Addressing these challenges requires global cooperation and urgent action to reduce emissions, protect ecosystems, and promote sustainable practices.
What are the four levels in the evolution of TQM?
1- Inspection: conformity evaluation by observation and judgment accompanied as appropriate by measurement, testing or gauging.
2- Quality control: part of quality management focused on fulfilling requirements.
3- Quality assurance: part of quality management focused on providing confidence that quality requirements will be fulfilled.
4- Total quality management: the application of quality management principles to all aspects of the organisation, including customers and suppliers, and their integration with the key business processes.
