Question

Darwin's 'Theory of Natural Selection' is mainly based on the following points - (A) All organisms show a tendency to increase numbers by producing a greater number of off-spring that can survive and reproduce.
(B) The generations continue to modify for adaptation, thereby gradually bringing changes in the species in the future.
(C) The individuals exhibit similarities in their physiological, structural and behavioral traits to bring identical structures.
(D) The number of individuals in a given species remains more or less constant.
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only
• B. (A), (B) and (C) only
• C. (A), (B), (C) and (D)
• D. (B), (C) and (D) only

Hint:

In Darwin's theory, natural selection is driven by overproduction, competition, and the survival of the fittest, which leads to gradual changes in a species.

Answer 1

The Correct Option is A

Step 1: Understanding the concept of Natural Selection.
Darwin’s Theory of Natural Selection proposes that:
- Organisms produce more offspring than can survive, leading to competition for resources. - Natural selection occurs when advantageous traits help individuals survive and reproduce, passing these traits on to the next generation.
Step 2: Analyzing the options.
- (A) is true because organisms do tend to produce more offspring, which is a basis of natural selection.
- (B) is true because species gradually adapt to their environment, as described by the process of natural selection.
- (C) is incorrect because natural selection leads to variation in traits, not necessarily identical traits.
- (D) is true because natural selection generally maintains a balance in population numbers.
Step 3: Conclusion.
The correct answer is (1) (A), (B) and (D) only.
Final Answer: \[ \boxed{\text{The correct answer is (1) (A), (B) and (D) only.}} \]