Introduction
The NDA/CDS (National Defence Academy / Combined Defence Services) Examination 1, 2026, conducted by the Union Public Service Commission (UPSC), is one of the most prestigious exams for candidates aspiring to join the Indian Armed Forces.
The General Science section in this exam tests conceptual understanding and application-based knowledge of Biology, Chemistry, and Physics.
In this Biology Class – 6, we focus on two vital branches — Genetics and Ecology — through Multiple Choice Questions (MCQs) designed to strengthen conceptual clarity, improve accuracy, and enhance exam readiness.
Subtopics Covered
🧬 Part A: Genetics
- Introduction to Genetics
- Definition, importance, and history (Gregor Mendel’s experiments)
- Heredity and variation
- Mendelian Inheritance
- Law of Segregation
- Law of Dominance
- Law of Independent Assortment
- Genetic Terms and Concepts
- Genes, Alleles, Genotype, Phenotype
- Dominant and Recessive traits
- Homozygous and Heterozygous conditions
- Chromosomes and DNA
- Structure and function of chromosomes
- DNA as the genetic material
- Basic idea of mutation and its effects
- Applications of Genetics
- Selective breeding, genetic engineering, and cloning
🌿 Part B: Ecology
- Introduction to Ecology
- Definition, scope, and importance
- Levels of organization: individual, population, community, ecosystem
- Ecosystem Structure and Function
- Biotic and abiotic components
- Food chains, food webs, and ecological pyramids
- Energy Flow in Ecosystems
- Trophic levels and energy transfer (10% law)
- Role of producers, consumers, and decomposers
- Environmental Balance and Conservation
- Biodiversity and its importance
- Pollution and its types (air, water, soil)
- Conservation of natural resources
- Human Impact on the Environment
- Global warming, deforestation, and sustainable development
MCQ Practice & Exam Relevance
- Each session will include concept-based MCQs similar to those asked in previous NDA/CDS papers.
- Emphasis on elimination techniques, time management, and concept clarity.
- Questions will test application-based reasoning, not just memorization.
Conclusion
This class aims to help NDA/CDS aspirants master core Biology concepts in Genetics and Ecology, which form an integral part of the General Science syllabus.
By combining concept explanation with MCQ practice, students will develop a deeper understanding of how living systems function and interact — essential knowledge for both the exam and a career in the Armed Forces.
“Strong concepts lead to strong confidence — both in exams and on the battlefield.”
