UPSC Ki Taiyari

Important deserts of the world: Deserts are characterized by their extreme aridity and high temperatures during the day and low temperatures at night. The lack of moisture in the air and on the ground makes it difficult for plants and animals to survive in these regions. Hot deserts, such as the Sahara and the Arabian Desert, have daytime temperatures that can exceed 120 degrees Fahrenheit (50 degrees Celsius), while nighttime temperatures can drop to below freezing. These deserts experience very little rainfall, often less than 10 inches (25 centimeters) per year. Cold deserts, such as the Gobi and the Patagonian Desert, have temperatures that can also be extreme, but tend to be much cooler than hot deserts. They also experience very little rainfall, often less than 6 inches (15 centimeters) per year. In addition to being dry, cold deserts can be subject to strong winds and occasional snowfall. Deserts also exhibit unique weather patterns, such as sandstorms, dust devils, and flash fl

Sickle cell anaemia 1- Sickle cell anemia is a genetic blood disorder that affects millions of people around the world. It is caused by a mutation in the hemoglobin gene, which is responsible for producing a protein that helps red blood cells carry oxygen throughout the body. 2- In sickle cell anemia, the mutated hemoglobin causes red blood cells to become stiff and sickle-shaped, which can block blood flow and cause pain, organ damage, and other complications. 3- Sickle cell anemia is most common in people of African descent, but it can also occur in people of Hispanic, Middle Eastern, and Mediterranean descent. 4- People with sickle cell anemia can experience a range of symptoms, including fatigue, pain, infections, and organ damage. Treatment can help manage these symptoms and prevent complications. 5- Treatment for sickle cell anemia can include medications, blood transfusions, and bone marrow transplants. Early diagnosis and ongoing management are important for improving quality o