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19 solved questions on Biology
CSS 2026General Science & AbilityQ. 3
(a) Explain the key phases of Disaster Risk Management: mitigation, preparedness, response, and recovery. (b) Describe the physical factors that trigger Avalanches in mountainous regions. Name the modern technologies used in avalanche prediction and monitoring. (c) Discuss the structural diversity of lipids. Evaluate how variations in fatty acid composition influence membrane fluidity and cell signalling mechanisms. (d) Describe the process of solar photovoltaic energy conversion. How do factors such as irradiance, panel orientation, and temperature influence solar power output?
#cssnexus #Disaster Risk Management #Disaster Management Phases #Avalanche Triggers
CSS Nexus6 Nov 2026
CSS 2025General Science & AbilityQ. 3
(a) Explain how temperature and light intensity affect the rate of photosynthesis in plants. (b) Describe the structure and functions of capillaries in the human blood circulatory system. (c) What is hepatitis? Give its types and briefly explain its common symptoms along with preventions. (d) Differentiate between biomass and biogas. Briefly explain various methods for obtaining energy from biomass.
#cssnexus #Photosynthesis #Rate of Photosynthesis #Limiting Factors
CSS Nexus6 Nov 2026
CSS 2025General Science & AbilityQ. 5
(a) Differentiate between food contaminants and food adulterants. (b) Enlist major food groups based on nutrients, their functions and sources. (c) What is Artificial Intelligence and how does it differ from traditional programming? Describe the main branches of Artificial Intelligence. (d) What are the advantages of optical fibers in communication system? Draw basic structure of optical fiber and explain propagation of light through it.
#cssnexus #Food Contaminants #Food Adulterants #Food Groups
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 2
(a) What is the Tuberculosis and Hepatitis? Explain briefly. (b) Explain the mechanism of Fiber Optic Cable for signal. Explain its construction. (c) Explain the difference between Middle Latitude Cyclones and Tornadoes. (d) What is difference between the Ionic and Covalent bonding? Give examples.
#cssnexus #Tuberculosis #Hepatitis #Fiber Optic Cable
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 4
(a) What is role of Carbohydrates and Vitamins in the body? Discuss briefly. (b) Discuss the functioning of Liver and Pancreas. (c) What are the standards of drinking water? How Heavy Metals in the water affect the living organisms? (d) What is radioactivity? Discuss the laws of radioactivity. Name two radioactive elements.
#cssnexus #Role of Carbohydrates #Role of Vitamins #Liver Functions
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 5
(a) What are the Plant nutrition elements? Enumerate them. (b) What is difference between software and hardware? Give five examples of each. (c) What are the types of earthquake waves? Discuss them. (d) What are longitudinal waves, electromagnetic and Gamma radiations? Discuss them.
#cssnexus #Plant Nutrients #Essential Elements for Plants #Macronutrients and Micronutrients
CSS Nexus6 Nov 2026
CSS 2023General Science & AbilityQ. 3
(a) (i) Why the bat and whale are considered as mammals? (ii) Write a note on liver juice 'Bile'. (b) How the urine is formed? Describe the role of kidney in excretion. (c) (i) How a bacterial cell is different from a plant cell? (ii) What do you think cold-blooded animals are slowed down by low temperatures? (d) What is hepatitis, its types, causes, prevention, and cure?
#cssnexus #Mammals #Bat and Whale #Bile
CSS Nexus6 Nov 2026
CSS 2023General Science & AbilityQ. 5
(a) What are antioxidants and why are they used in foods? Write a short note on natural and synthetic antioxidants. (b) How the carbohydrates, proteins, and fats are digested in humans? (c) How does the Navstar GPS system work for different applications? (d) (i) Differentiate between network and internet. (ii) What is the difference among application, program and software?
#cssnexus #Antioxidants #Natural and Synthetic Antioxidants #Human Digestion
CSS Nexus6 Nov 2026
CSS Special 2023General Science & AbilityQ. 4
(A) Write a note on data storage in a 'USB'. How is it different from the Hard disk? (B) Describe how a 'Solar Cell' converts light into electricity. Describe its construction, operation, and applications. (C) Write a comprehensive note on the 'Food cycle in our body'. (D) What is 'Artificial Intelligence'? How is it helpful for humanity?
#cssnexus #USB Flash Drive #Flash Memory #USB and Hard Disk
CSS Nexus6 Nov 2026
CSS Special 2023General Science & AbilityQ. 5
(A) Explain the concept of Diabetes, its causes and classifications in the human body. (B) Describe different sources of Renewable Energy. How is it helpful for the environment? (C) Define 'Enzymes'. Describe its types and functions within organisms. (D) Describe the 'Cell Structure'. Elaborate 7 main functions of a cell in human beings.
#cssnexus #Diabetes #Types of Diabetes #Causes of Diabetes
CSS Nexus6 Nov 2026
CSS 2022General Science & AbilityQ. 3
(a) Discuss Vaccination, types of Vaccines, their side-effects and effectiveness. (b) What is Polio? Discuss its symptoms, causes of spreading, prevention and vaccine. (c) What do you understand by the DNA and RNA? (d) What is Solid Waste? Discuss the main issues of Solid Waste Management in our country?
#cssnexus #Vaccination #Types of Vaccines #Vaccine Side Effects
CSS Nexus6 Nov 2026
CSS 2021General Science & AbilityQ. 3
(a) Explain with examples the relationship between cells, tissues and organs. (b) Explain the differences in structure & function between a cell wall and a cell membrane. (c) What is meant by transpiration? Explain in detail the significance of leaf structure in the process of transpiration. (d) What is meant by the term double circulation? Briefly describe how the heart is adapted to keep blood flowing in a double circulation.
#cssnexus #Cells Tissues and Organs #Cell Wall #Cell Membrane
CSS Nexus6 Nov 2026
CSS 2021General Science & AbilityQ. 5
(a) Define the term 'malnutrition'. Elaborate its major causes and consequences. (b) Explain how a slice of bread after few days decomposes due to the growth of fungi. (c) What is a computer memory? Describe its units and discuss various types of memories. (d) Differentiate between natural and artificial satellites. Briefly describe the working of communication satellites with some applications.
#cssnexus #Malnutrition #Stunting #Bread Mould
CSS Nexus6 Nov 2026
CSS 2020General Science & AbilityQ. 3
(a) What are Pesticides? Explain their different types; why persistent pesticides are more lethal for mankind? (b) What are carbohydrates? Classify and give detail of each class along with examples. (c) Discuss different methods of Food preservation. (d) Where and how Fiber Optics are used? Also write down their advantages and disadvantages.
#cssnexus #Pesticides #Types of Pesticides #Persistent Pesticides
CSS Nexus6 Nov 2026
CSS 2019General Science & AbilityQ. 2
(a) Deficiency of vitamins causes different human diseases. Choose the correct type of vitamin (Vit. A, Vit. B1, Vit. C, Vit. D, Vit. E, Vit. K) for each disease: 1. Poor night vision 2. Bleeding gums 3. Rickets in children 4. Beri-Beri 5. Anaemia. (b) People suffering from cardiovascular disease having high level of cholesterol in their blood, this often leads to build of fats on its internal arterial walls, suggest how this might be harmful to the heart. (c) Why the excessive use of chemical fertilizers should be avoided? (d) Why are Scientists worried about the increase of CO2 in atmosphere?
#cssnexus #Vitamin Deficiency Diseases #Cholesterol #Atherosclerosis
CSS Nexus6 Nov 2026
CSS 2019General Science & AbilityQ. 4
(a) What is the importance of forests in the economy of a country? (b) Give a brief account of biotechnology. (c) Do the mammals always lay eggs? If yes, where in the world do they live? Write the name some of them. (d) How can the sun have such a strong gravitational field if it's made of gases?
#cssnexus #Importance of Forests #Forests and Economy #Biotechnology
CSS Nexus6 Nov 2026
CSS 2018General Science & AbilityQ. 3
(A) Describe different causes and preventions of 'Polio'. (B) Define the term 'Bio-Fuel'. How is it helpful to promote clean energy? (C) Define 'Carbohydrates'. Describe different steps to digest these in the human body. (D) Describe the 'Cell Structure'. Write down at least three differences between an animal cell and plant cell.
#cssnexus #Polio #Polio Prevention #Polio in Pakistan
CSS Nexus6 Nov 2026
CSS 2017General Science & AbilityQ. 3
(A) Explain in detail the common causes of Heart Attack. (B) Differentiate between drug addiction and drug abuse. (C) Draw the structure of human ear and briefly explain its functions. (D) What is the significance of Vitamins? Describe the sources, uses and deficiency symptoms of fat soluble vitamins.
#cssnexus #Heart Attack #Causes of Heart Attack #Drug Addiction
CSS Nexus6 Nov 2026
CSS 2016General Science & AbilityQ. 5
(a) Comment, 'liver is the chief chemist in human body'. (b) What is Cholesterol? Discuss its importance, normal blood level and dangers of elevated levels with reference to the health and disease in humans.
#cssnexus #Liver #Cholesterol #Human Physiology
CSS Nexus6 Nov 2026