➤ Tulsi (Ocimum sanctum) is known for its medicinal properties and is commonly used to treat cold, cough, and respiratory issues.
★ Tulsi contains compounds like eugenol and cineole, which have antimicrobial and anti-inflammatory effects.

➤ Aquarium is a man-made or artificial ecosystem where living organisms like fish and plants are kept under controlled conditions.
★ It is created and maintained by humans, unlike natural ecosystems like forests or deserts.

➤ Ascorbic acid is the scientific name for Vitamin C, an essential nutrient important for immune function, skin health, and collagen synthesis.
★ Deficiency of Vitamin C causes scurvy, a disease marked by bleeding gums and weakness.

➤ The nucleus controls cell functions and contains genetic material, but it is not involved in lipid metabolism. That function is associated with smooth endoplasmic reticulum.
★ Lysosomes digest waste, mitochondria produce ATP, and ribosomes synthesize proteins — all correctly matched.

➤ Jaundice, also known as icterus, is a medical condition where excess bilirubin in the blood causes yellowing of the skin and eyes.
★ It is often related to liver disorders, such as hepatitis or bile duct obstruction.

➤ Paleoecology studies past environments and ecosystems using data from fossils, sediments, and pollen records.
★ It helps understand climate change, extinction events, and historical biodiversity.

➤ The small intestine is the longest part of the alimentary canal and is responsible for most of the digestion and absorption of nutrients.
★ It can measure up to 6 meters in humans.

➤ Aves is the biological class that includes all birds, characterized by feathers, beaks, and the ability to lay hard-shelled eggs.
★ Birds are warm-blooded vertebrates with a four-chambered heart.

➤ These microbes help in nitrogen cycling: Rhizobium fixes atmospheric nitrogen, Nitrosomonas converts ammonia to nitrites, and Nitrobacter converts nitrites to nitrates.
★ This cycle is crucial for plant growth and soil fertility.

➤ Glucose is the best organic substrate for respiration. Yeast uses nutrients for fermentation. Glycolysis is the process where glucose is converted into pyruvic acid, which acts as an intermediate in further breakdown.
★ This sequence plays a vital role in cellular respiration.

➤ Nephrons are the structural and functional units of the kidneys, responsible for filtration of blood and formation of urine.
★ Each kidney contains around 1 million nephrons.

➤ Typhoid (caused by Salmonella typhi), Cholera (Vibrio cholerae), and Tuberculosis (Mycobacterium tuberculosis) are all bacterial diseases.
★ These are treated using antibiotics.

➤ Starch is found in plant-based foods like potatoes and grains, not in egg yolk (which is rich in proteins and fats).
★ Egg yolk does not contain starch, making option B incorrect.

➤ Malaria is caused by Plasmodium, Diarrhoea often by Rotavirus, Typhoid by Salmonella typhi, and Cholera by Vibrio cholerae.
★ These pathogens affect major systems like digestive and circulatory in humans.

➤ Spines are modified leaves or stems mainly for protection, not part of the actual floral structure. Androecium (male part), Corolla (petals), and Calyx (sepals) are true components of a flower.
★ Understanding flower parts is essential for questions in plant reproduction.

➤ Acetic acid is the main component of vinegar and is widely used in food preservation and seasoning.
★ It gives vinegar its sour taste and is also called ethanoic acid.

➤ Both mammals and birds are warm-blooded (endothermic), meaning they can maintain a constant body temperature regardless of the environment.
★ This adaptation helps in survival in diverse climates.

➤ Casein is the main protein in milk, especially bovine milk, contributing to about 80% of total protein. It provides essential amino acids and is crucial for growth and development.
★ Casein is used in cheese production and as a nutritional supplement.

➤ Pulses are dry, low-moisture foods with a long shelf life, making them non-perishable. Others like milk, curds, and meat spoil quickly.
★ Pulses are rich in proteins and fiber and are important for food security.

➤ Annelida → Earthworm, Arthropoda → Ant, Echinodermata → Sea star, Platyhelminthes → Tapeworm. These groups are based on body structure and symmetry.
★ Important for understanding animal classification in biology.

➤ Drugs are classified by chemical structure, molecular targets, or pharmacological effects, not by behavioral conditions.
★ Classification helps in drug discovery and clinical treatment.

➤ Spirillum is a spiral-shaped bacterium, while Bacillus is rod-shaped, Coccus is spherical, and Vibrio is comma-shaped.
★ Shape is key in bacterial classification and identification.

➤ Chameleon is a cold-blooded reptile. Others like Pavo (peacock), Macropus (kangaroo), and Psittacula (parrot) are warm-blooded animals.
★ Cold-blooded animals regulate temperature through external sources.