The answer is genetic drift (bottleneck effect)
<span>There are 4 basic mechanisms of evolution - mutation, genetic drift, natural selection, and gene flow (migration). Genetic drift is a change in the frequency of alleles in a population as a result of random sampling of organisms. One of the examples of genetic drift is the bottleneck event. </span>The bottleneck event means drastic reduction of the population size because of environment changes. The consequence of this is the reduction of genetic variation. This is what happened to the population of worms after tree falling.
<span>Lynn Margulis supported the endosymbiotic theory and
studied mitosis in cells. She was an American evolutionary theorist who made
great significance in the symbiosis of organisms in biological evolution. She
is also a developer of the Gaia Theory, which believes that the Earth functions
as a single self-regulating system. </span>
It helps your body be more flexible and prepared to run.
Answer:
Plants that are close to each other might compete for nutrients, water, sunlight, and territory necessary for sirvival
