Lesson 6.3: Biology (Human Physiology, Plants, Diseases, Nutrition, Biotechnology)
Biology is a key part of the General Science section for NDA and CDS exams. It helps aspirants understand living organisms, human body functions, and modern biotechnology applications, which are often linked to defence scenarios.
1. Human Physiology
-
Circulatory System: Heart, Blood vessels, Blood components
-
Respiratory System: Lungs, Gas exchange, Breathing process
-
Digestive System: Organs, Enzymes, Nutrient absorption
-
Nervous System: Brain, Spinal cord, Reflex actions
2. Plant Biology
-
Photosynthesis: Process, Chlorophyll, Energy conversion
-
Plant Structures: Roots, Stem, Leaves, Flowers
-
Reproduction: Sexual and Asexual reproduction in plants
3. Diseases & Immunity
-
Common Diseases: Malaria, Typhoid, Tuberculosis
-
Prevention: Vaccination, Hygiene, Nutrition
-
Immune System: White blood cells, Antibodies
4. Nutrition & Human Health
-
Macronutrients: Carbohydrates, Proteins, Fats
-
Micronutrients: Vitamins and Minerals
-
Balanced Diet: Importance for energy, growth, and immunity
5. Biotechnology & Defence Applications
-
Genetic Engineering: Basics and applications
-
Biotech in Defence: Vaccines, Biowarfare prevention, Environmental monitoring
Exam Tips
-
Focus on human physiology and plant biology diagrams
-
Memorize nutrient sources and functions
-
Solve previous year NDA & CDS biology questions
-
Relate biological concepts to real-life and defence applications
