Question

Какие факторы оказывают влияние на появление различий между особями в пределах вида ?

Answer 1

Экологическая и географическая изоляция.
Географическая- разделение популяций территориально,например,если изменяются условия ареала или происходит переселение популяций за пределы ареала,например,горный массив,река и т.д. 
Экологический - несовпадение времени размножения.

Answer 2

Factors Influencing Variations Within a Species

When it comes to the factors influencing variations within a species, several key elements play a significant role. These factors can be broadly categorized into genetic, environmental, and random influences.

Genetic Factors: Genetic factors are a primary driver of variations within a species. The genetic makeup of an organism, inherited from its parents, plays a crucial role in determining its characteristics and traits. Genetic variations can arise from mutations, genetic recombination during reproduction, and the presence of multiple alleles for a particular gene.

Environmental Factors: Environmental factors also contribute significantly to the variations observed within a species. Environmental conditions such as temperature, humidity, availability of resources, and exposure to different ecological niches can influence the development and expression of traits in organisms. For example, the availability of food, water, and shelter can impact an organism's growth and survival, leading to variations within the species.

Random Influences: Random influences, including chance events and genetic drift, can also lead to variations within a species. These random factors may not be directly tied to genetic or environmental influences but can still contribute to the diversity observed within a population. Random mutations and genetic recombination events can introduce new variations, while genetic drift can cause certain traits to become more or less common in a population over time due to chance events.

Conclusion: In summary, the emergence of differences within a species is influenced by a complex interplay of genetic, environmental, and random factors. The combination of these influences shapes the diversity observed within populations of the same species.