a population adapts over time. an individual cannot adapt during its lifetime. it happens over many generations.
Populations evolve.
Evolution is defined as a change in allele frequencies over time. Since individuals have only the set of alleles that they're born with, an individual cannot evolve. This leaves the population as the smallest unit that can evolve.
It is not correct to say that individuals evolved because it is not possible for an individual to change drastically over their own timelife. Species have the faculty to evolve as a whole not as individual organisms.
Mushrooms do not have legs so they can't move.
The smallest unit that can evolve is the population, not the individual. In other words, you can't evolve, but over generations, the population can be subject to natural selection and different traits can be selected. In addition, the evolution of a population will take generations of fluctuating gene frequencies, something you can't just watch in action. Of course, the speed of evolution is entirely dependent on the environment; some populations will evolve quicker than others.
Basically it is because they die and any mutations in germ lines, genetic recombinations and any beneficial variations die with them. Only populations evolve because the frequency of alleles in population gene pools change over time due to the selection of individuals who pass on these frequency changing traits to progeny.
Get a pokemon to a certain level
the smallest unit of evolution is population.
Single individuals are naturally selected, but populations ( can be whole species ) evolve. Any mutation happening in the germ line of an individual will die with him. Only his progeny can inherit said mutation and evolve. Evolution is the change in allele frequency over time in a population of organisms.
If an adaptation were non-inheritable it could not cause the population to evolve because it would not be part of the populations gene pool.
which of the following evolve? population, genera, kingdoms, phyla, or individuals
limiting factor