Which one of the following sequences was propsoed by Drawin and Wallace for organic evolution?

Options

A. Overproduction, variations, constancy of population size, natural selection.
B. Variations, constancy of population size, over-production, natural selection
C. Overproduction, constancy of population size, variations, natural selection
D. Variations, natural selection, overproduction, contancy of population size.

Answer

**Step-by-Step Solution:**

1. **Understanding Organic Evolution**: Organic evolution refers to the gradual changes in living organisms over time. It is a process that explains how species adapt and change in response to their environment.

2. **Theory of Natural Selection**: Charles Darwin and Alfred Wallace proposed the theory of natural selection as the mechanism for organic evolution. This theory explains how certain traits become more common in a population due to the advantages they confer in survival and reproduction.

3. **Limited Resources**: In any ecosystem, resources such as food, space, and mates are limited. This limitation leads to competition among individuals within a population for these resources.

4. **Competition**: The first step in the process of natural selection is competition. Organisms must compete for limited resources, which influences their survival.

5. **Overproduction**: The next step involves overproduction, where more offspring are produced than can survive due to limited resources. This creates a struggle for existence.

6. **Variations**: Within a population, there are variations among individuals. These variations can be beneficial, neutral, or harmful. Beneficial variations enhance an organism’s ability to survive and reproduce.

7. **Natural Selection**: The final step is natural selection, where individuals with beneficial variations are more likely to survive and reproduce. Over time, these advantageous traits become more common in the population.

8. **Conclusion**: The correct sequence proposed by Darwin and Wallace for organic evolution is:
- Overproduction
- Competition
- Variations
- Natural Selection

Thus, the correct answer is option C.

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