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Polyisoprene is the synthetic version of natural rubber.

It has similar properties.

It is commonly used to make rubber products.

Explanation

Methane (CH₄) is produced during the anaerobic fermentation of biomass.

It is the main component of biogas.

It is widely used as a renewable energy source.

Explanation

Androecium is the collective term for the male reproductive parts of a flower, called stamens.

Each stamen typically consists of an anther (pollen-producing) and a filament.

Explanation

Fossil fuels form underground from dead plants and animals without oxygen over millions of years.

The anaerobic (oxygen-free) conditions help in the slow decay and transformation into coal, oil, or gas.

Explanation

During respiration, the body uses oxygen to produce energy and releases carbon dioxide as a waste product.

This CO₂ is exhaled through the lungs.

Explanation

Explanation

Concave mirrors focus light into a strong, parallel beam, making them ideal for headlights and searchlights.

They reflect light from the bulb placed at their focus point, projecting it forward efficiently.

Explanation

The nucleus is the most important part of the cell as it controls all the activities of the cell, including growth, metabolism, and reproduction.

It contains the cell's genetic material (DNA) which regulates gene expression and directs protein synthesis.

Explanation

A derived quantity is obtained from fundamental quantities (like mass, length, and time).

Force = Mass × Acceleration (Newton’s Second Law), so it is derived from mass, length, and time.

Explanation