Explanation

• The correct sequence of biological organization is: Atom → Molecule → Cell → Tissue → Organ

This sequence represents the hierarchy of biological organization, from the smallest units (atoms) to the largest (organs):

• Atoms (the building blocks of matter)
• Molecules (groups of atoms bonded together)
• Cells (the basic structural and functional units of life)
• Tissues (groups of similar cells performing a specific function)
• Organs (structures composed of two or more types of tissues working together)

Explanation

Guard cells regulate the opening and closing of stomata, controlling gas exchange and transpiration.

They surround the stomata and change shape in response to environmental conditions, opening or closing the stomata as needed.

Explanation

Saprotrophs are living organisms that derive their food from dead and decaying organic materials.

It playing a crucial role in decomposing organic matter and recycling nutrients in ecosystems.

Explanation

Horticulture is the branch of agriculture concerned with the cultivation of fruits, vegetables, nuts, seeds, and ornamental plants.

It involves the development of new varieties of plants, their breeding.

The improvement of their yield, quality, and resistance to diseases.

Explanation

The rate of evaporation can be increased by:

• Decreasing atmospheric pressure
• Increasing temperature
• Decreasing humidity
• Increasing the surface area of the liquid

Explanation

The boiling point is the temperature at which a pure liquid changes state from liquid to gas at standard atmospheric pressure.

Key Points:

• The melting point is the temperature at which a solid changes state to a liquid.
• The freezing point is the temperature at which a liquid changes state to a solid.

Explanation

The work done on an object is calculated as the product of the force applied and the distance over which the force is applied:

Work = Force x Distance

= 6 N x 2 m

= 12 J

So, the work done is 12 Joule.

Explanation

A burning candle is an example of all three states of matter:

• Solid: The wax is in a solid state.
• Liquid: The melted wax is in a liquid state.
• Gas: The vaporized wax and combustion products are in a gaseous state.

Explanation

• Your weight, as measured on Earth, will be decreased if you move to a planet or moon with a weaker gravitational field.
• Weight is the force exerted on an object by gravity.
• It depends on both the mass of the object and the strength of the gravitational field.

Explanation

The stability of a racing car is increased by lowering its center of gravity, which reduces the risk of rollover or loss of control.

This can be achieved through design elements like a lower ride height, a wider stance, or a lower seating position for the driver.