C++ | MCQs

Explanation

• Condensation is the process by which water vapor (gas) changes to liquid water, releasing energy in the form of heat.
• This occurs when warm air, containing water vapor, comes into contact with a cool surface.
• It causing the water vapor to condense into droplets of water.

Explanation

• Gases have neither a fixed volume nor a fixed shape.
• As their particles are widely spaced and free to move in any direction, expanding to fill their container.

Explanation

• Cholera is a waterborne disease caused by the bacterium Vibrio cholerae, which is typically found in contaminated water sources.
• If a child has cholera, it indicates that they have ingested contaminated water.
• It addressing water pollution is crucial to prevent further spread of the disease.

Water pollution can cause:

• Waterborne diseases (cholera, typhoid, diarrhea)
• Death of aquatic life (fishes, animals, plants)
• Health problems (immune depression, reproductive failure, acute poisoning)

Explanation

• Coleoptile is a protective sheath that covers the emerging plumule (shoot) in grasses, including maize (Zea mays).
• It is a characteristic feature of monocotyledonous plants, particularly in the family Poaceae (grass family).

Explanation

• When carbon dioxide is released in the dough, it gets trapped in the dough, causing it to expand and rise.
• This is what makes bread and other baked goods light and fluffy.

Explanation

• Yeast fermentation converts sugars into carbon dioxide gas and ethanol.
• It causing the dough to rise.

Explanation

• E. coli (Escherichia coli) is a type of bacterium.
• Specifically a gram-negative, rod-shaped bacterium that is commonly found in the gut of humans and other animals.

Explanation

Microorganisms are typically classified into three main groups:

1. Bacteria (single-celled prokaryotes)
2. Viruses (tiny infectious agents that replicate inside the cells of an organism)
3. Fungi (organisms that obtain their nutrients by decomposing organic matter or by forming symbiotic relationships with other organisms)

Explanation

• The correct answer is: Mammal → Shark
• Sharks are actually fish, not mammals.
• The correct example for mammals would be: Mammal → Human, Lion, Elephant, etc.

Explanation

Plants are divided into two main groups:

1. Flowering Plants (Angiosperms): These plants produce flowers and fruits. Examples include: Roses, Sunflowers, Tomatoes, Wheat and Hibiscus etc.
2. Non-Flowering Plants (Gymnosperms): These plants do not produce flowers or fruits. Examples include: Ferns, Mosses, Pine trees and Cycads etc.