Explanation

Reproduction is the biological process by which new individuals are produced, ensuring the continuation and survival of a species.

It is a fundamental aspect of life, allowing species to perpetuate themselves, adapt to their environments, and evolve over time.

Explanation

The dermis is the middle layer of the skin.

It contains a network of blood capillaries that supply oxygen and nutrients to the skin cells.

The dermis also contains hair follicles, sweat glands, and sebaceous glands.

Explanation

The kidneys are enclosed in a membrane called the peritoneum, which is a thin layer of tissue that lines the abdominal cavity.

The peritoneum supports and protects the kidneys, as well as other organs in the abdominal cavity.

Explanation

The Tetanus toxoid vaccine is typically injected into the muscle of the upper arm.

This intramuscular injection ensures effective absorption and immune response.

Explanation

Evaporation occurs when molecules on a liquid's surface gain enough energy to escape into the air, and this can happen at any temperature, not just at boiling point.

It's a slow process at lower temperatures, but faster at higher temperatures.

Explanation

The potential energy (PE) of an object is calculated as:

PE = mass x gravity x height

= 1 kg x 10 m/s^2 x 1 m

= 10 Joule

So, the energy possessed by the body is 10 Joule.

Explanation

One Faraday (F) is equal to 96,500 Coulombs (C).

The Faraday is a unit of electric charge.

It represents the amount of charge required to deposit one mole of electrons (6.022 x 10^23 electrons) at an electrode.

Explanation

• Hydrogen (H2) is the lightest molecule, with a molecular weight of 2.016 g/mol.
• According to Graham's Law of Diffusion, the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight.
• Therefore, hydrogen diffuses the fastest.

Explanation

• De Broglie extended the wave-particle duality to electrons in 1923.
• He proposed that particles such as electrons exhibit wave-like properties.
• A hypothesis that was later confirmed experimentally and became a fundamental concept in quantum mechanics.

Explanation

Each gram of fat supplies the body with approximately 9 calories.

This is more than the energy provided by carbohydrates (4 calories per gram) and protein (4 calories per gram).