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A random mutation is introduced into the genome, whether by genetic mistake or otherwise. If it makes any difference to the behavior of the bacterium is unlikely, but if it is beneficial it will have an advantage over competitors. Which makes it more likely for it to reproduce and more likely to pass on the beneficial mutation. This process repeats and success! The bacterium has evolved.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoBacteria a re variants and some of these variants are resistant to the antibiotics used against them, so these bacteria survive attack by antibiotics, reproduce in great numbers ( been selected ) the progeny that poses these beneficial traits, So now we have many resistant bacteria and it is becoming quite a problem
Wiki User
∙ 9y agoOne example of traits bacterial may develop through natural selection is drug-resistance: if anti-biotic drugs are applied to a population of bacteria, but some survive, then it will generally be those variants that for some reason are better at resisting the drug that survive. The population from that point onward consists almost exclusively of variants that have better resistance to the drug.
But, more generally speaking, all features of bacteria are the result of billions of years of evolution, from the composition of its cell-membrane to the molecular details of its metabolic pathways.
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What did darwin call the process by which evolution takes place?
The book, On The Origin Of Species, " suggested " that organisms evolve through the process of natural selection. The nonrandom survival and reproductive success of randomly varying organisms
Is it true that through natural selection harmful variations gradually accumulate in a species?
yes
What principle states that living things change gradually over time through natural selection?
The theory of evolution by natural selection.
How do things change over time?
They adapt and evolve through the process of natural selection and learned behaviours.
What process did Darwin's book suggest that organisms evolve through?
These three ideas seem to run together, so it's important that you are able to distinguish among them. The theory that organisms change over time is evolution. The mechanism by which organisms evolve is natural selection. Survival of the fittest explains how natural selection works.Answer = Natural SelectionThe process of natural selection, of course.
Did penguins go through natural selection?
Yes, penguins, like all animals, have gone through natural selection. Scientific evidence supports this notion.
How could natural selection affect the songs that birds sing?
Through ongoing natural selection a population adapts to its enviroment
What is the scientific definition of Darwinism?
All species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
Which scientist contributed to evolutionary theory through the study of natural selection?
Charles Darwin contributed to the evolutionary theory through study of natural selection.
How do adaptations arise in a species?
Through natural selection and evolution
Explain why the evolution of resistance to antibiotics in bacteria is an example of directional natural selection?
All bacteria, as are all organisms, are variants and some of these variants are resistant to antibiotics. So, a population of bacteria, in their immediate environment, are subjected to an antibiotic and most succumb. So, the resistant, survive the onslaught ( are naturally selected ) and reproduce progeny that are also resistant to the antibiotic. So, allele frequency shifts and evolution occurs die to the adaptive change conferred on the progeny population by natural selection.
What does natural selection directly work on?
Natural selection acts on the genotype, but indirectly, through the phenotype.
Why does natural selection not directly affect genes?
Natural selection acts on the way organisms interact with one another and with their environment. The genes of organisms are not usually themselves involved in this interaction: they direct it through intermediaries such as proteins. So natural selection must work through these intermediaries to affect genes.
Who presented the theory of evoloution through natural selection?
Charles Darwin
What is behavior shaped through natural selection?
wolves hunting in packs
What is a behavior shaped through natural selection?
Wolves hunting in packs.
How is resistance to antibiotics shared from one bacteria to another?
Bacteria develop resistance to antibiotics through the process of natural selection. The antibiotic will kill most of the population of bacteria but not all because some of them already have the resistance. Also if the antibiotic is not utilized correctly ( according to a physicians instructions ) some of the more hardy individuals of the bacteria population will live. These bacteria breed and produce offspring that are also more resistant to antibiotics. Generations of bacteria happen much more rapidly than with people so the ability of bacteria to adapt to new environments is much more robust with respect to time.
