Explanation

• Pressure is a fundamental physical quantity that is defined as the force exerted per unit area.
• It is a measure of the strength of a force acting on a surface.
• It is typically measured in units such as Pascals (Pa) or pounds per square inch (PSI).

Last verified on 10-02-2026

Explanation

• Xylem is the plant tissue responsible for transporting water and minerals from roots → stem → leaves.
• It consists of continuous tubes made of dead cells for easy water flow.

Additional information:

• Phloem: Transports food (sugars) from leaves to other parts

Explanation

Scalar quantities are physical quantities that have only magnitude (amount or size) but no direction.

Examples of scalar quantities include:

• Mass
• Temperature
• Time
• Energy
• Distance

Last verified on 07-02-2026

Explanation

A nucleotide, the building block of DNA and RNA.

It consists of three components:

1. A phosphate group (phosphate)
2. A sugar molecule (deoxyribose in DNA and ribose in RNA)
3. One of four nitrogenous bases (Adenine, Guanine, Cytosine, and Thymine in DNA; Adenine, Guanine, Cytosine, and Uracil in RNA)

Last verified on 07-02-2026

Explanation

• Uracil (U) is not a base found in DNA.
• Instead, it is found in RNA (ribonucleic acid), where it replaces Thymine (T).

The four organic bases found in DNA are:

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

Last verified on 03-02-2026

Explanation

• Some organisms feed on dead and decaying organic matter instead of living organisms.
• These organisms are called saprotrophs.
• They play an important role in decomposition and nutrient recycling in ecosystems.
• Examples include fungi, bacteria, and some protists.

Last verified on 01-02-2026

Explanation

• In maize (Zea mays), the first structure to emerge from the seed during germination is the radical root.
• It is also known as the primary root.
• This root grows downward into the soil, anchoring the seedling and absorbing water and nutrients.

Last verified on 01-02-2026

Explanation

There are four fundamental states of matter: solid, liquid, gas and plasma

1. Solid: Fixed shape and volume; particles tightly packed.
2. Liquid: Fixed volume but takes container's shape; particles close but move.
3. Gas: No fixed shape or volume; particles far apart and move freely. 
4. Plasma: Ionized gas, found in stars, lightning; electrically charged.

Explanation

• Transpiration is the process by which plants lose water in the form of vapor from leaves, stems, and flowers.
• It helps in cooling the plant, nutrient transport, and maintaining water balance.

Additional information:

• Evaporation: Water loss from soil or water surfaces
• Respiration: Energy release by breaking down sugars
• Photosynthesis: Production of food using sunlight, CO₂, and water

Last verified on 27-01-2026

Explanation

Bees must collect nectar from approximately 2 million flowers to make 1 pound of honey.

This immense effort requires bees to fly roughly 55,000 to 90,000 miles

A honey bee visits 50 to 100 flowers during a single,, dedicated collection trip.

Production Context: It takes approximately 556 worker bees to gather enough nectar for 1 pound of honey.