It is how often a particular allele appears in a population.

It is the differences among members os a species.

If the allelic frequency stays the same generations.

All alleles of a population’s genes.

The percentage of any one specific allele.

A group of individuals of the same species living in a particular area at the same time.

If organisms can choose their mating partners, then the more desirable alleles will have a higher frequency in future populations.

A mutation in a parents DNA could result in offspring with different alleles, changing the allele frequency of the population.

It occurs when the allele frequency of a population changes by chance.

It is any movement of genes from one population to another.

Individuals with the best adapted phenotypes will survive and pass of their genes to the next generations.

It refers to change through time as species become modified and diverge to produce multiple descendant species.

It maintains that all diverse forms of life that are now in existence have come into being through a gradual and continual process of modification of ancestral forms.

It is the change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction.

It is the process whereby organisms that are better adapted to their environment survive and reproduce while those less adapted fail to do so. 

It depends upon the existence of phenotypic variation within the population.

It describes how successful an organism has been at passing on its genes.

It has a great influence to which trait will be passed on to the next generation.

A key factor in the struggles for existence, was how well suited an organism is to its environment.

Darwin called the ability of an organism to survive and reproduce in its environment fitness.

Darwin purposed that fitness is the result of adaptations.

The Central Idea of Biological Evolution states that all life on Earth shares a common ancestor.

Father of Evolutionary Thought

Charles Darwin published: On the Origin of Species by means of Natural Selection on 1895.

Mechanism of Evolution is anything that doesn't changes the frequency of alleles in a population is a mechanism of evolution.

It is a biological theory that explains why organisms seem to match their environmental niches so well.

Individuals that have certain heritable characteristics survive and reproduce at a higher rate than other individuals.

It brings about adaptation and evolution.

Natural Selection is not evolution. It is a driving force for evolution to happen.

It should be capable of substantial modification of species over many hundreds of generations. Even if the advantages of some heritable traits over others are slight, the advantageous variations will gradually accumulate in the population, and less favorable variations will diminish.

It favors intermediate variants.

The intermediate states become more common and each extreme variation will become less common or lost.

Genetic diversity decreases as the population stabilizes on a particular trait. and favors intermediate variants.

Example: Human Birth Weight

It favors individuals at both extremes of a characteristic range. 

Example: Population of White, Black, and Gray Rabbits, placed on an environment with black rocks and white rocks. Both white rabbits and black rabbits can hide from predators, while gray rabbits will be eaten.

It occurs when a certain allele has greater fitness than others, resulting in an increase in the frequency of that allele until it is fixed in the population gene pool. 

Example: Human Height

It is a special kind of selection that acts on traits that help animals increase their chances of mating. 

Example: The male peacock has an elaborate train (tail) to attract the peahen to mate.

This states that there are many different phenotypes found in a population, each group represents a morph.

Example: Two morphs of the moth, Boston betularia.

Modification of a species through human actions that encourage the breeding of certain traits over others. 

“It works the same way as natural selection, except that with natural selection it is nature, not human interference, that makes these decisions.” - National Geographic

It occurs whenever a human exerts selective pressure on a population in order to improve or modify particular desirable traits.

The genotype is altered to produce a new strain of the organism for a specific purpose. 

Human preferences or influences have a significant effect on the evolution of a particular population or species. 

Selective breeding, an example of this, in which particular individuals are selected for breeding because they possess desired characteristics or excluded from breeding because their traits are undesirable.

Individuals with beneficial traits are more likely to be 'selected' that is, to have more offspring than individuals with other, less beneficial traits.

When those traits have a heritable component they tend to become more common in the next generation.

Alleles with an average result in greater fitness become more abundant in the next generation, while alleles with generally reduced fitness become rarer. 

If the selection forces remain the same for many generations. beneficial alleles become more and more abundant, while alleles with lesser fitness disappear.

It involves natural process of selection, favoring the most fittest

It involves the artificial process where selection is done by favoring the desired characters in the new organism.

Chances of surviving is increased

Chances of surviving of new breed is at risk.

It is slow and has long process.

It is faster and has shorter process.

It is controlled by nature.

It is controlled by humans.

It is performed on all types of organisms.

It is processed on some selective organisms of humans desires.

Selection is totally based on the adaptable character and the one who is able to cop up in all types of natural conditions.

Selection is done on the basis of required character.

It could transform the entire population of a species.

It could bring out new variety of species.

Man-made selection.

It occurs in domestic populations.

It occurs in all kind of natural population

Artificial Breeding removes variation in a population.

In natural selection, organisms can be susceptible to diseases  or changes in the environment.