Explanation

• In a parallel circuit, each branch has its own path for current to flow.
• If one branch is interrupted, the other branches will continue to operate normally.

Explanation

• 70 mg/dL: This is a low blood sugar level, indicating hypoglycemia. 
• 120 mg/dL: This is within the normal to pre-diabetic range, depending on other factors. 
• 100 mg/dL: This is a normal blood sugar level and does not indicate diabetes

Explanation

 A blood pressure reading of 60/90 mmHg is considered low blood pressure (hypotension). 

Explanation

Bile is a fluid made and released by the liver and stored in the gallbladder.

Bile helps with digestion.

It breaks down fats into fatty acids, which can be taken into the body by the digestive tract

Explanation

Red blood cells (RBCs) are primarily responsible for transporting oxygen from the lungs to various tissues in the body.

They contain a protein called hemoglobin, which binds to oxygen molecules, facilitating their transport.

Explanation

About 97% of the Earth's water is contained in the oceans, which is saltwater.

The remaining 3% is freshwater, but most of it is frozen in glaciers and polar ice caps.

Only about 0.3% of the Earth's water is freshwater that is readily available for human consumption, agriculture, and other uses.

Explanation

Invertebrates are animals that do not have a backbone or spinal column. This group includes:

• Insects
• Arachnids (like spiders and scorpions)
• Crustaceans (like crabs and lobsters)
• Mollusks (like squids and octopuses)
• Echinoderms (like starfish and sea urchins)
• Worms

Explanation

• The speed of sound in air at 0°C (32°F) is 332 meters per second.

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s

Explanation

• When red litmus paper is dipped in a basic solution, it turns blue.
• This indicates that the solution is basic, or alkaline.

Note: When blue litmus paper is dipped in an acid solution, it turns red.

Explanation

 The additional, small, circular, extrachromosomal piece of DNA in a bacterial cell is called a plasmid.

Structure: Small, double-stranded, circular DNA molecules.

Location: Found in the cytoplasm of bacteria (extrachromosomal).

Function: They typically contain non-essential but advantageous genes, such as those for antibiotic resistance.

Last updated 17-02-2026