The **TNUSRB SI Exam** (Tamil Nadu Uniformed Services Recruitment Board Sub-Inspector Exam) includes a **General Science** section, which may cover topics related to **Evolution**. Evolution is a key topic in biology and is often included in competitive exams. Below is a detailed syllabus for **Evolution** that could be relevant for the TNUSRB SI Exam:
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### **Evolution Syllabus for TNUSRB SI Exam**
1. **Introduction to Evolution**
– Definition of evolution
– Historical background of evolutionary theories
– Contributions of scientists like Charles Darwin, Alfred Russel Wallace, and Jean-Baptiste Lamarck
2. **Theories of Evolution**
– **Lamarck’s Theory of Inheritance of Acquired Characteristics**
– **Darwin’s Theory of Natural Selection**
– Key principles: Variation, overproduction, struggle for existence, survival of the fittest
– **Modern Synthetic Theory of Evolution** (Neo-Darwinism)
– Role of mutations, genetic recombination, and natural selection
3. **Evidence of Evolution**
– **Fossil Evidence**: Fossil records and their significance
– **Anatomical Evidence**:
– Homologous organs
– Analogous organs
– Vestigial organs
– **Embryological Evidence**: Similarities in embryonic development
– **Molecular Evidence**: DNA and protein similarities among species
4. **Mechanisms of Evolution**
– **Genetic Variation**: Mutation, recombination, and gene flow
– **Natural Selection**: Types (stabilizing, directional, disruptive)
– **Genetic Drift**: Founder effect and bottleneck effect
– **Speciation**: Allopatric and sympatric speciation
5. **Human Evolution**
– Origin of life on Earth
– Evolution of primates
– Key stages in human evolution:
– Australopithecus
– Homo habilis
– Homo erectus
– Homo neanderthalensis
– Homo sapiens
6. **Adaptation and Radiation**
– Concept of adaptation
– Adaptive radiation (e.g., Darwin’s finches)
7. **Hardy-Weinberg Principle**
– Definition and assumptions
– Application in population genetics
8. **Evolutionary Patterns**
– Convergent evolution
– Divergent evolution
– Co-evolution
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### **Sample Questions**
1. Who proposed the theory of natural selection?
– a) Lamarck
– b) Darwin
– c) Mendel
– d) Wallace
2. Which of the following is an example of homologous organs?
– a) Wings of birds and insects
– b) Forelimbs of humans and bats
– c) Fins of fish and flippers of dolphins
– d) None of the above
3. What is the significance of fossil records in the study of evolution?
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Make sure to check the **official TNUSRB SI Exam syllabus** for any updates or changes. Focus on understanding the concepts and practicing questions to score well in the General Science section. Good luck with your preparation!
