Explanation

An ecosystem develops through a series of successional stages.

The final, stable stage is called the climax community.

It is characterized by a balanced and self-sustaining ecosystem.

Explanation

The main purpose of cellular respiration is to convert chemical energy stored in nutrients (specifically glucose) into ATP (adenosine triphosphate),

They acts as the usable energy currency for cellular processes.

It breaks down glucose in the presence of oxygen to produce ATP, carbon dioxide, and water. 

Explanation

• A toxin is a poison produced naturally by a plant.
• It protects the plant from herbivores and pathogens.

Additional information:

• Examples of toxic plants: Ricinus (Castor), Nerium (Oleander), Datura, Aconitum, Foxglove

Last verified on 25-01-2026

Explanation

Cellular activities require energy to function, which comes from molecules like ATP.

ATP (adenosine triphosphate) stores energy in its phosphate bonds.

When a phosphate bond is broken, energy is released for cellular processes.

This energy powers activities like muscle contraction, nerve signaling, and biosynthesis.

Therefore, phosphate bonds are the primary source of energy in metabolism.

Explanation

Diabetes mellitus is a metabolic disorder where the body cannot properly regulate blood glucose.

It occurs due to insufficient insulin production or poor insulin response.

High blood sugar over time can damage organs like the heart, kidneys, and eyes.

Symptoms include frequent urination, excessive thirst, and unexplained weight loss.

Explanation

Noble gas atoms generally do not form bonds under normal conditions

Due to their full valence electron shells, making them highly stable and inert.

However, under extreme pressure, low temperatures, or with highly reactive elements like fluorine and oxygen,

They can form compound bonds, primarily involving heavier gases like xenon. 

Explanation

Beta decay emits high-energy, high-speed particles,

Specifically, an electron  along with an antineutrino, or a positron along with a neutrino

These particles are emitted from the atomic nucleus to achieve a more stable neutron-to-proton ratio. 

Explanation

Fossil fuels like coal, oil, and natural gas are primarily composed of carbon and hydrogen.

These elements are stored energy from ancient plants and organisms.

When burned, they release energy along with carbon dioxide and water.

The high carbon and hydrogen content makes them excellent sources of fuel.

Oxygen and nitrogen are present in very small amounts compared to carbon and hydrogen.

Explanation

LPG (Liquefied Petroleum Gas)

Mainly consists of hydrocarbons like propane and butane.

These are gases composed of hydrogen and carbon atoms.

It is used as fuel for cooking and heating.

Explanation

Air always moves from regions of high pressure to low pressure.

This movement creates wind and drives weather patterns.

The greater the pressure difference, the stronger the wind.

High-pressure areas are usually associated with clear skies.

Low-pressure areas often bring clouds and precipitation.