Explanation

Bromine is one of the only two elements (along with mercury) that are liquid at room temperature.

The others listed are solid or gas under normal conditions.

Explanation

 Flagella are long, whip-like structures that help bacteria move.

Cilia are found in some eukaryotic cells (not bacteria).

Pseudopodia are used by amoebas (not bacteria).

Pili are used for attachment and DNA transfer, not movement.

Explanation

Polythene is a thermoplastic because it softens when heated and can be reshaped.

It is formed by polymerization of ethene molecules.

Explanation

The Sun has already used up roughly half of its hydrogen fuel in approximately 4.6 billion years.

It is currently in the stable phase of its life cycle, converting hydrogen to helium through nuclear fusion.

In about 5 billion years, the Sun will exhaust its hydrogen fuel and begin its transformation into a red giant.

Explanation

A refrigerator transfers heat from inside to outside using thermodynamic cycles.

It relies on principles like heat absorption, compression, and expansion of refrigerants.

Explanation

The Earth moves around its axis once in 24 hours — this is called rotation.

While its motion around the Sun once in approximately 365 days is called a revolution.

(Note: You mentioned "356 days" — this appears to be a typo. The correct value is approximately 365.25 days.)

Explanation

Scientific socialism is strongly associated with Karl Marx.

He, along with Friedrich Engels, developed this theory in the mid-1800s

Analyzing societal structures through a historical, economic, and scientific lens, particularly focusing on class conflict.

Explanation

The plants and vegetation of a region are collectively known as flora.

Flora refers to the plant life occurring in a particular region or time. 

Explanation

• a) Tuberculosis – Caused by the bacterium Mycobacterium tuberculosis 

• b) Typhoid – Caused by the bacterium Salmonella typhi 

• c) Cholera – Caused by the bacterium Vibrio cholerae 

• d) Influenza – Caused by the influenza virus (NOT a bacterium)

Explanation

 Aviophobia is the specific fear or anxiety associated with flying in airplanes.