Explanation

The most important risk factor for lung cancer is tobacco smoking.

Experts estimate 85 to 90% of lung cancers are due to smoking.

Explanation

Reverse osmosis is a water purification process

that uses a partially permeable membrane to remove ions,

unwanted molecules and larger particles from drinking water.

Explanation

Explanation

Colour of the plants is green due to the presence of Chlorophyll۔

Chlorophyll absorbs certain wavelengths of light within the visible light spectrum.

Chlorophyll is the green color pigment which absorbs wavelength from sunlight.

Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis. 

Explanation

Every planet in our solar system except for Venus and Uranus rotates counter-clockwise as seen from above the North Pole; that is to say, from west to east.

This is the same direction in which all the planets orbit the sun. Uranus was likely hit by a very large planetoid early in its history, causing it to rotate "on its side," 90 degrees away from its orbital motion.

Venus rotates backwards compared to the other planets, also likely due to an early asteroid hit which disturbed its original rotation.

Explanation

Graphite is used for making the electrode in a dry cell.

Explanation

• The Golgi apparatus is a membrane-bound organelle that contains enzymes.
• It is responsible for processing and modifying proteins and lipids synthesized by the endoplasmic reticulum.
• It is a key component of the cellular machinery involved in protein secretion and cell signaling.

Explanation

Fats has the highest calorific value.

Explanation

Sunlight entering the water may travel about 1,000 meters into the ocean under the right conditions,

but there is rarely any significant light beyond 200 meters.

The ocean is divided into three zones based on depth and light level.

The upper 200 meters of the ocean is called the euphotic, or "sunlight," zone

ND5-07-2023

Explanation

Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids

Sound can not travel through vaccum