Explanation

• Bromophenol blue is a pH indicator that changes color in response to changes in acidity or basicity.
• In an acidic medium, it is yellow, and in a basic medium, it turns blue.

Explanation

• Milk has a pH level of around 6.5-7, which is slightly acidic to neutral. 
• This is because milk contains lactic acid and other acidic compounds.

Explanation

• A series circuit is a circuit that provides only one path for the current to flow.
• If one component is removed or fails, the entire circuit is interrupted.

Explanation

• Frequency is the number of vibrations or oscillations produced by a vibrating body in one second.
• It's measured in Hertz (Hz), where 1 Hz equals one vibration per second.

Explanation

• When sound waves reach the ear drum, it vibrates and causes the small bones (ossicles) behind the eardrum to vibrate.
• These vibrations are then transmitted to the liquid in the inner ear (cochlea).
• Where they are detected by small hairs (hair cells) and converted into electrical signals that are sent to the brain via the auditory nerve.

Explanation

• Crystallization is the process of obtaining a solid substance from a solution by allowing the solution to cool and form crystals.
• This process is used to purify substances and obtain a solid in a pure form.

Explanation

• The cell wall is a thick, permeable layer that surrounds the plant cell.
• It provides support, protection, and shape.
• It is composed of cellulose, hemicellulose, and pectin.
• It is responsible for maintaining the cell's rigidity and structure.

Explanation

• Dew is a common outcome of condensation.
• Where water vapor in the air condenses onto surfaces.
• It forming tiny droplets of water.

Explanation

Dicot plants are characterized by:

• Leaves with netted venation
• Seeds with two cotyledons
• Flowers with four or a multiple of four floral leaves

Having leaves with parallel venation is actually a characteristic of monocot plants, not dicots.

Explanation

• Cat is a secondary consumer because it eats primary consumers (birds and mice).
• Which are herbivores that eat plants and plant products.