Question Discussion & Solution

The correct answer is All of these

• An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.
• The three most common operating systems for personal computers are Microsoft Windows, Mac OS X, and Linux.
• Modern operating systems use a graphical user interface(GUI).
• An Operating System (OS) is an interface between a computer user and computer hardware. An operating system is a software that performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers.
• Some popular Operating Systems include Linux Operating System, Windows Operating System, VMS, OS/400, AIX, z/OS, etc.
• The following are some of the important functions of an operating system:
  • Memory Management
  • Processor Management
  • Device Management
  • File Management
  • Security
  • Control over system performance
  • Job accounting
  • Error detecting aids
  • Coordination between other software and users

The correct answer is Multiple fission.

• The ability of a cell to divide into several cells during reproduction in Plasmodium is called multiple fission.​

Key Points

• Cell- It is the structural and functional unit of life.
  • It is first discovered by Robert Hooke in 1665.
• According to Schwann and Schleiden, All new daughter cells are formed from pre-existing cells.
• Reproduction is a distinctive characteristic of Living Organisms.
  • Living organisms reproduce and give rise to similar organisms of the same species.
• Fission is the process in which a single cell divides into two or more than two cells.
  • When a single cell divides into two cells called Binary fission.
  • When a single cell divides into many cells called Multiple fission.

Important Points

• Plasmodium after feeding on RBCs undergoes asexual reproduction which is called schizogony or multiple fission. 
• In multiple fission, plasmodium divides into many cells.

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Concept-

• When the functioning of one or more organs or systems of the body is adversely affected, characterized by various signs and symptoms, we say that we are not healthy, i.e., we have a disease.
• Diseases can be broadly grouped into infectious and non-infectious.
• Diseases that are easily transmitted from one person to another, are called infectious diseases.
• Infectious diseases are very common and every one of us suffers from these at some time or other. Some of the infectious diseases like AIDS are fatal.
• Non-infectious disease cancer is the major cause of death.

Important Points

• Hepatitis B is a liver disease that is caused by the hepatitis B virus (HBV).
• The virus is known to interfere with the functions of the liver and cause pathological damage.
• It can be both acute or chronic disease.
• HBV is spread by contact with the blood or body fluids of an infected person.

Explanation-

• Human beings have been abusing the water bodies around the world by disposing of them all kinds of waste.
• We tend to believe that water can wash away everything not taking cognizance of the fact that the water bodies are our lifeline as well as that of all other living organisms.
• Sewage from our homes as well as from hospitals is likely to contain many undesirable pathogenic microorganisms.
• Its disposal into the water without proper treatment may cause an outbreak of serious diseases, such as dysentery, typhoid, jaundice, cholera, etc.

Therefore Hepatitis-B is not a contaminated water disease.

Mistake Points

• Jaundice and Hepatitis B are not the same.
• Hepatitis B is a disease, while jaundice is a symptom.
• Jaundice symptom can be caused by many different reasons and Hepatitis B is just one of them. It can also be caused due to contaminated water.

Additional Information

Jaundice

• Jaundice can spread through contaminated water.
• It is a disease caused due to the accumulation of bilirubin in the blood and blood tissues.
• The disease causes yellowish discoloration of the skin, eyes, and other mucous membranes. 
• It is common in newborn babies because the newborn’s liver is not fully developed.
• Symptoms of Jaundice are fever, abdominal pain, weight loss, drowsiness, vomiting, etc.

Cholera

• Cholera is an acute diarrhoeal disease that can kill within hours if left untreated.
• It is caused due to the consumption of contaminated food or water.
• The provision of safe water and sanitation is critical to control the transmission of cholera and other waterborne diseases.
• It is caused by the bacterium Vibrio cholera.
• People may feel pain in their abdomen, nausea, vomiting, or watery Diarrhoea.
•  

The correct answer is the Insert Tab.

Key Points

• Cover Button can be used to insert a pre-formatted cover page for a document.
• The information that is to appear on the page is filled in after the page is created.
• It is used to fill in the title, author, date, and other information.
• It is present in the Insert tab of MS word.

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Important Points

Other important tools of Insert Tab

In the mixed series, the letter added 2 and number added 12 we get-

 Hence, "76" is the correct answer.