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If there were no differences in an organisms ability to survive and reproduce what would there be to select from? Variation in populations is key to the naturally selective process and these variations that are reproductively successful are passed on to progeny which leads to the change in populations over time called evolution.
What else can I help you with?
What two testable assumptions were the basis for Darwin's hypothesis?
Darwin made bold assumptions about heritable variation, the age of Earth, and relationships among organisms. First, in order for beak size and shape to evolve, there must be enough heritable variation in those traits to provide raw material for natural selection. Second, differences in beak size and shape must produce differences in fitness that cause natural selection to occur.
Living things do not adapt to their surroundings by?
Living things do not adapt to their surroundings by choosing to do so. Adaptations occur through the process of natural selection, where individuals with traits that are better suited to their environment are more likely to survive and reproduce, passing on those advantageous traits to future generations. Adaptations are a result of genetic variation and environmental pressures, not a conscious choice by the organism.
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.
How are Dobzhansky and Mayr's ideas about the origin of species similar to Darwin's?
Dobzhansky and Mayr's ideas about the origin of species are similar to Darwin's in that they all propose natural selection as the main mechanism driving evolution. They also emphasize the importance of variation within populations as the raw material for evolution to occur. Additionally, they highlight the concept of species diverging from common ancestors through the process of adaptation to different environments.
Where does variation occur?
Variation or mutation occurs within the DNA. It is a natural result of the replication process, or the copying of one DNA strand to make new DNA during reproduction. If the new mutation ends up making some kind of variation that does not kill the organism, then the variation will be passed on to new generations. This is how new traits are formed. When the variation is actually more useful than a trait that the organism's parents had, that new variation will be passed along as a survival trait.
Which of these is necessary for natural selection to occur genetic engeneering genetic variation asexual reproduction or enviormental stability?
Genetic variation is necessary for natural selection to occur. This variation provides the raw material for differential survival and reproduction, which drives the process of natural selection. Without genetic variation, there would be no differences for natural selection to act upon.
Genetic variation is a necessary condition of which process?
Genetic variation is one of the conditions required for Natural Selection to occur.
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
Why must there be genetic variation in order for natural selection to occur?
Genetic variation is necessary for natural selection to occur because it provides different traits and characteristics within a population. These variations create diversity, allowing some individuals to have traits that are more advantageous for survival and reproduction in certain environments. Without genetic variation, there would be no differences in traits to be selected for or against, and natural selection would not be possible.
Why must a population have a genetic variation in order for natural selection to occur?
Without variation there is nothing to select from.
Why does cloning contradict the principles of natural selection?
Cloning contradicts natural selection because it creates identical copies of organisms, rather than allowing for genetic diversity and variation necessary for species to evolve and adapt to changing environments. Natural selection relies on genetic variation for the process of evolution to occur, which is limited in cloned organisms.
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.
How are the four principles of natural selection necessary for natural selection to occur?
The four principles of natural selection (variation, inheritance, differential reproduction, and adaptation) are necessary for natural selection to occur because they describe the process by which certain traits are passed on to future generations based on their ability to help individuals survive and reproduce in their environment. Variation provides the raw material for natural selection, inheritance ensures that beneficial traits can be passed down, differential reproduction leads to the accumulation of advantageous traits in a population, and adaptation allows organisms to better survive and thrive in their environment over time.
In order for evolution by natural selection to occur what has to happen?
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
