Organic evolution is change in

Options

A. Single individual
B. A few members of population
C. Major portion of population
D. Entire populations.

Answer

**Step-by-Step Solution:**

1. **Understanding Organic Evolution**: Organic evolution refers to the gradual process through which species change over time. It involves changes in the genetic makeup of populations in response to various environmental factors.

2. **Identifying the Scope of Change**: The question asks about the extent of change in organic evolution. It is important to determine whether the changes occur in a single individual, a few members of a population, a major portion of a population, or the entire population.

3. **Genetic Composition Changes**: The key aspect of organic evolution is the change in genetic composition. This change does not typically occur in isolation within a single individual but rather affects groups of organisms within the population.

4. **Major Portion of Population**: Changes in genetic composition generally imply that a significant number of individuals within a population are affected. This is because evolution is a gradual process that takes place over generations, influencing a major portion of the population rather than just a few individuals.

5. **Conclusion**: Based on the understanding that organic evolution involves significant changes in the genetic makeup of populations, the correct answer is that organic evolution is a change in a major portion of the population.

**Final Answer**: Organic evolution is a change in a major portion of the population.

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