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Basically because populations evolve and individuals are selected. Let us assume that a beneficial mutation occurs in a individual organism. Even if beneficial in the immediate environment it must be in the germ line and passed on to progeny who mate with other organisms whose genes must work in concert with the new mutation that then needs to spread far enough into the populations gene pool so that there is a change in allele frequency that leads to, perhaps, some morphological or behavioral change. This can take uncounted generations, or can be a bit quicker. But, never in one jump.

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What is the smallest level of at which evolution occurs?

Evolution can occur at the level of populations rather than individuals. Changes in allele frequencies within a population over generations is the basis of evolution, and this can happen through mechanisms like natural selection, genetic drift, and gene flow.


What mechanisms must be in place in order for evolution to occur?

For evolution to occur, there must be genetic variation within a population, inheritability of these genetic traits from one generation to the next, differential survival and reproduction based on these traits (natural selection), and long periods of time for changes to accumulate across generations.


Why does evolution evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?

Differential selection is just that, differential. Some variation is marginally superior to another variation us fitness difference, so the key is to have variation. Then natural selection will " see " this slight variation and select the better adapted trait against the background of the immediate environment.


Evolution suggests that the life we see today developed by chance.?

Evolution is not simply a result of chance, but rather a process driven by natural selection and genetic variation over time. It is a gradual and non-random change in species that leads to better adaptability to their environment. Random mutations may occur, but it is natural selection that determines which traits are advantageous and will be passed on to future generations.


How are organisms related to evolution?

Organisms are related to evolution through the process of natural selection. Evolution is the change in the heritable characteristics of biological populations over successive generations, which occurs as a result of natural selection acting on heritable traits. Organisms that possess advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring, leading to changes in the population over time.

Related Questions

What are the 4 mechanisms by which evolution can occur?

genetic drift, mutation, natural selection, and migration


What is the smallest level of at which evolution occurs?

Evolution can occur at the level of populations rather than individuals. Changes in allele frequencies within a population over generations is the basis of evolution, and this can happen through mechanisms like natural selection, genetic drift, and gene flow.


What mechanisms must be in place in order for evolution to occur?

For evolution to occur, there must be genetic variation within a population, inheritability of these genetic traits from one generation to the next, differential survival and reproduction based on these traits (natural selection), and long periods of time for changes to accumulate across generations.


Why does evolution evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?

Differential selection is just that, differential. Some variation is marginally superior to another variation us fitness difference, so the key is to have variation. Then natural selection will " see " this slight variation and select the better adapted trait against the background of the immediate environment.


Generally evolution by natural selection occurs quite slowly over?

Evolution through natural selection occurs slowly over millions of years. It has been hypothesized that evolution is the result of positive mutations that occur in a community of organisms that help them survive better. Evolution is essentially descent with modification.


Evolution suggests that the life we see today developed by chance.?

Evolution is not simply a result of chance, but rather a process driven by natural selection and genetic variation over time. It is a gradual and non-random change in species that leads to better adaptability to their environment. Random mutations may occur, but it is natural selection that determines which traits are advantageous and will be passed on to future generations.


What are three reasons for natural selection to occur?

1. different breeding 2. evolution 3.adaptation


How does natural selection provide a mechanism for evolution to occur?

by having sexual intercourse with hoes and getting money


How are organisms related to evolution?

Organisms are related to evolution through the process of natural selection. Evolution is the change in the heritable characteristics of biological populations over successive generations, which occurs as a result of natural selection acting on heritable traits. Organisms that possess advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring, leading to changes in the population over time.


What allows natural selection and evolution to occur for a tree?

Natural selection occurs in trees through genetic variation within a population, environmental pressures that favor certain traits, and differential reproductive success based on those traits. Evolution occurs as advantageous traits are passed on to future generations, leading to changes in the population over time.


Why is Lamark not called the father of Evolution?

Because it was Darwin who made it a scientifically plausible explanation, by providing a mechanism by which evolution could occur....Natural Selection.


Can the cultural evolution occur faster than biological evolution?

Yes, cultural evolution can occur much faster than biological evolution because cultural traits can be rapidly spread and adopted among populations through communication, imitation, and technology, whereas biological evolution relies on genetic changes that accumulate over generations through the process of natural selection. This allows cultural adaptations to occur more rapidly in response to changing environments or social needs.