Explanation

The skin is considered the largest organ of the human body.

It covering an area of about 1.5-2 square meters (16-22 square feet).

It weighing around 3-4 kilograms (7-9 pounds).

Explanation

Amphoteric substances are those that can react with both acids and bases.

They can donate or accept protons (H+ ions), depending on the conditions.

Examples of amphoteric substances include water (H2O), amino acids, and certain metals like zinc and aluminum.

Explanation

Alpha (α) radiation consists of heavy, positively charged particles (alpha particles) that are emitted from the nucleus of an atom during certain types of radioactive decay.

Alpha particles are highly ionizing, meaning they can efficiently remove tightly bound electrons from atoms, resulting in the formation of ions.

Explanation

Chondrocytes are the cells that make up cartilage, a type of connective tissue found in various parts of the body, such as joints, ears, nose, and ribs.

Chondrocytes produce and maintain the cartilage matrix, which consists of collagen and proteoglycans.

Explanation

An atom consists of three subatomic particles:

1. Protons (positively charged)
2. Neutrons (neutral)
3. Electrons (negatively charged)

Additional Information:

A neutral atom has equal protons and electrons; imbalance creates ions.

Discovered by John Dalton in 1808 (Atomic Theory).

Cation = positive ion,
Anion = negative ion,
Isotopes = same element with different neutrons,

Explanation

Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in organisms.

Explanation

The Frontal Lobe (part of the Cerebrum) controls reasoning, planning, and problem-solving.

More Details
Cerebellum → balance & coordination,
Medulla → involuntary actions,
Cerebrum → higher thinking functions, divided into 4 lobes (Frontal, Parietal, Temporal, Occipital).

Explanation

Bernoulli’s Principle explains that faster airflow over the wings creates lower pressure, producing lift that keeps the airplane in the air.

Explanation

Parsec (per sec) is an astronomical unit used to measure large distances between stars or galaxies.

1 parsec ≈ 3.26 light years.

Explanation

• Wavelength is the distance between two consecutive points on a wave that are in phase.
• It is typically denoted by the symbol λ (lambda).

Key Points:

• Time period (T) is the time taken by the wave to complete one oscillation.
• Frequency (f) is the number of oscillations per unit time.
• Amplitude (A) is the maximum displacement of the wave from its equilibrium position.