Exam: TOEFL

Definition: A method used to separate different substances in a mixture based on how they interact with a moving liquid or gas and a stationary material.

Example: The scientist used chromatography to analyze the components of the chemical mixture.

Definition: A type of cell that contains pigment and can change color by expanding or contracting, found in some animals like lizards and in certain bacteria.

Example: The chameleon can change its color thanks to the chromatophores in its skin.

Definition: A shiny, metallic finish made from a chromium alloy, often used for plating objects to make them look attractive and resist corrosion.

Example: The car's chrome bumpers gleamed in the sunlight.

Definition: To cover a surface with a shiny layer of chromium, often to enhance appearance or protect against rust.

Example: The mechanic decided to chrome the car's bumpers for a sleek look.

Definition: The difference between a color and a reference color that has the same brightness, often used in color television and imaging.

Example: In video processing, chrominance is important for accurately representing colors.

Definition: A type of mineral that is a source of chromium, usually found in a black or dark brown color.

Example: Chromite is an important mineral used in the production of stainless steel.

Definition: A shiny, hard metal that is resistant to rust and is used in making strong steel and other materials.

Example: Chromium is often added to steel to make it stronger and more resistant to corrosion.

Definition: A dense area in the nucleus of some cells where certain types of genetic material are concentrated.

Example: The chromocenter plays a crucial role in the organization of genetic material within the cell nucleus.

Definition: Easily colored or stained by dyes, often used to describe cells or structures in biology that absorb color.

Example: The chromophil cells in the tissue sample showed vibrant colors under the microscope.

Definition: A type of cell or cell structure that has an affinity for staining or coloring, often used in biological contexts to describe cells that readily absorb dyes.

Example: The chromophil cells in the tissue sample showed vibrant colors under the microscope.

Definition: A part of a molecule that can absorb light and gives color to that molecule.

Example: The chromophore in the dye is responsible for its bright red color.

Definition: A type of cell structure in plants that contains pigments, giving them colors like yellow or orange, and is different from the green pigment found in chloroplasts.

Example: The chromoplasts in the carrots give them their bright orange color.