Explanation

• There is no such nitrogenous base as "Tracil".

The nitrogenous bases are:

1. Adenine (A)
2. Thymine (T)
3. Cytosine (C)
4. Guanine (G)

Explanation

• Cats have a unique audible range that is adapted to their hunting and communication needs.
• They can hear sounds in the range of 45 Hz to 64,000 Hz, which is wider than humans and dogs.

Explanation

• Osmosis is the process where a solvent, typically water.
• It moves through a porous membrane from an area of lower solute concentration to an area of higher solute concentration.

Explanation

• Distillation is a process that removes dissolved physical and chemical impurities from water.
• By boiling the water and then collecting the condensed steam, which is free from many impurities.

Explanation

• The flash of light from lightning is a form of electromagnetic radiation, and as such, it travels at the speed of light.
• It is denoted by the letter c.

It is equal to:

• 3 x 10^8 meters per second (m/s) in scientific notation
• 300,000 kilometers per second (km/s) in metric units
• 186,282 miles per second (mi/s) in imperial units

Explanation

• Suspensions are heterogeneous mixtures that contain particles that are visible to the naked eye and settle out of the mixture over time.
• This is in contrast to solutions, which are homogeneous mixtures that contain dissolved particles that are not visible and do not settle out.

Explanation

• The freezing point of water (0°C or 32°F) is the same as its melting point.
• Which is the temperature at which water will freeze or melt.

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

• Fuel is the major source of release of direct pollutants in air pollution.
• Primarily due to the combustion of fossil fuels, which releases harmful pollutants into the atmosphere.

Fuel combustion releases pollutants such as:

• Particulate matter (PM)
• Carbon monoxide (CO)
• Nitrogen oxides (NOx)
• Sulfur dioxide (SO2)Volatile 
• organic compounds (VOCs)

These pollutants can come from various sources, including:

• Transportation (vehicles, airplanes)
• Industrial processes (power plants, refineries)
• Residential and commercial heating and cooking

Explanation

Seed germination requires three essential conditions:

1. Water (H2O): Seeds need water to break dormancy and initiate germination.
2. Oxygen (O2): Seeds require oxygen for cellular respiration and energy production.
3. Proper Temperature: Seeds germinate within a specific temperature range (usually between 16°C to 24°C), which activates enzymes and metabolic processes.