Explanation

Explanation

The Operating System (OS) acts as a bridge between the user and hardware, managing all software and hardware resources.

It is called a Resource Manager because it handles CPU, memory, input/output, and file system efficiently.

Explanation

Windows is an operating system developed by Microsoft Corporation.

It is widely used on personal computers.

It offers a graphical user interface (GUI).

Explanation

Pesticides are chemicals used to kill or repel insects that damage plants and crops.

They help protect agricultural yield by controlling pest populations.

Explanation

Antibodies are proteins produced by the immune system to neutralize or destroy antigens (disease-causing agents).

They are a key part of the body’s defense mechanism against pathogens like bacteria and viruses.

Explanation

Explanation

Frogs can breathe through their skin, lungs, and lining of the mouth, especially in water where cutaneous respiration is key.

This ability helps them absorb oxygen directly from their environment.

Earthworms and amphibians, such as frogs, breathe through their skin. 

Explanation

Tuberculosis (TB) is a bacterial infection caused by Mycobacterium tuberculosis, and its symptoms include:

• Fever
• Chest pain
• Coughing up blood or phlegm
• Sweating at night
• Fatigue
• Weight loss (not weight gain)

Explanation

Eukaryotic cells have a well-defined nucleus enclosed by a nuclear membrane.

Prokaryotic cells lack a nucleus — their DNA floats freely in the cytoplasm.

This is the main difference between the two.

Explanation