Explain reasons for the absence of uniformly and kinds of variation which may occurs with 8 points?

1. Genetic variation: Individuals within a population may have different genetic makeups, leading to variations in physical characteristics and traits.

2. Environmental factors: Differences in environmental conditions such as temperature, humidity, and availability of resources can lead to variations in individuals within a population.

3. Random mutations: Mutations in the DNA of organisms can lead to variations in physical characteristics and traits, which may or may not be passed on to future generations.

4. Natural selection: Organisms with certain traits may be better suited to their environment and more likely to survive and reproduce, leading to variations in the population over time.

5. Sexual reproduction: The mixing of genetic material from two individuals during sexual reproduction can lead to variations in offspring, resulting in differences within a population.

6. Migration: Movement of individuals between populations can introduce new genetic material and traits, leading to variations within and between populations.

7. Genetic drift: Random changes in the frequency of certain traits within a population due to chance events can lead to variations over time.

8. Artificial selection: Human intervention in breeding and selecting certain traits in organisms can lead to variations within populations that may not occur naturally.