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What would happen if there was zero variation between all of the organisms on earth?
Evolution cannot occur.
The process by which modern organisms have descended from ancient organisms is called?
The process by which modern organisms have descended from ancient organisms is called evolution.
What is the smallest level on which evolution can occur?
Natural selection acts upon the individual organism, whilst evolution occurs at the population level. The environment selects for organisms best adapted for highest survival and reproductive success. Natural selection requires three key things - variation, inheritable traits, and differential survival/reproduction. Species will produce more offspring than the environment can support(carrying capacity), and the population tends to be fairly stable until resources are limited. A struggle for existence is created, and natural selection ensures that weaker traits die out while stronger traits live on. Organisms show variation in characteristics, and that variation is heritable. Survival depends on inherited traits, and unequal survival/reproduction leads to adaptation and evolution. Therefore, while the individual organism can adapt, the population is what actually evolves.
What is the smallest group of organisms in which evolution can take place?
The smallest group of organisms wherein evolution can take place is a population. This is because all methods of evolution require chromosomes from more than one organism.
What statement is best supported by the theory of evolution?
Simple statement I often use to illustrate the definition of the theory of evolution by natural selection proceeded by the definition of evolution itself. Evolution is the change in allele frequency over time in a population of organisms. Natural selection is the nonrandom survival and reproductive success of randomly varying replicating organisms.
Why can't evolution cannot occur at the individuals level but must occur at the population level?
Evolution is a population-level process because it involves changes in the gene frequencies of a population over generations. Individual organisms do not evolve, as they do not pass on acquired traits to their offspring. Evolution occurs through mechanisms such as natural selection, genetic drift, and gene flow that act on the variation within a population.
Does evolution continue to occur in organisms today?
Absolutely. Evolution isn't an historical process; it is on-going as long as there is life.
What would happen if there was zero variation between all of the organisms on earth?
Evolution cannot occur.
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.
Does the process of evolution occur at the individual level, where selection happens to individuals, or at the population level, where selection happens to populations?
Evolution occurs at the population level, where selection happens to populations rather than individuals.
How can you say that evolution is going on in this era?
Evolution is the change in allele frequency over time in a population of organisms. This is observable and observed at the molecular level in this era.
What is a cure for evolution?
One word: extinction. As long as life exists, organisms will reproduce with variation - which means per definition that evolution will occur. The only way for evolution to stop happening is for life to cease existing.
Evolution can occur at different rates however for evolution to occur there must be?
variation in the traits of organisms, heredity (the ability to pass on those traits to offspring), and differential survival and reproduction based on those traits (natural selection). These elements work together to drive the process of evolution over time.
What happens to the number of organisms in each classification levels as you move from the kingdom level to each of the next levels?
evolution
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.
Lowest level at which evolution operates in the?
The lowest level at which evolution operates is the level of genes. Evolutionary changes occur through changes in the frequency of genes within a population over time, leading to variations in traits that can be inherited by offspring.
What level does micro evolution take place?
Where all evolution takes place initially, and some say totally. The population. Microevolution is just this; Evolution is the change in allele frequency over time in a population of organisms. Macroevolution is that change magnified, some say, at the taxa level.
