Question

Which of the following sequences fits into the organic evolution theory proposed by Charles Darwin and Alfred Wallace?

• A. Variations, constancy of population size, overproduction, natural selection
• B. Variations, overproduction, constancy of population size, natural selection
• C. Overproduction, variations, constancy of population size, natural selection
• D. Overproduction, constancy of population size, variations, natural selection

Hint:

Survival of the fittest is the end result of natural variations in a competitive environment.

Answer 1

The Correct Option is D

Step 1: Concept
Darwinism is based on several key observations of nature.
Step 2: Meaning
The theory suggests that species produce more offspring than can survive (overproduction), yet populations remain stable due to limited resources (constancy of population size).
Step 3: Analysis
This leads to a struggle for existence where individuals with favorable "variations" survive and reproduce. This process is known as "natural selection".
Step 4: Conclusion
The logical sequence is: Overproduction $\rightarrow$ Constancy of population size $\rightarrow$ Variations $\rightarrow$ Natural selection.
Final Answer:(D)