An individual entering a population is referred to as an "immigrant." This can occur through various means, such as migration or dispersal, and can impact the genetic diversity and dynamics of the population. Immigrants can introduce new traits and behaviors, potentially enhancing the population's adaptability and resilience. Their integration into the population may also influence social structures and competition for resources.
limiting factor
Evolution occurs in population not in an individual.
Antibodies are used to fight from foreign particles (pathogen generally) entering in the body of an individual.
Emigration.
an individual is talking about one person whereas a population is talking about more than one person
a population adapts over time. an individual cannot adapt during its lifetime. it happens over many generations.
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The difference in between an individual, a population, a community, and an ecosystem is and individual (also known as an organism) is only one thing. The difference in between an an organism and a population is a population is multiple organisms. The difference between a population and a community is a group of populations make a community which of course makes a whole ecosystem.
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An individual is a single organism belonging to a population, which is a group of individuals of the same species living in the same area and capable of interbreeding.
A sample.
In population genetics and population ecology, population size (usually denoted N) is the number of individual organisms in a population.