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Exam: Cambridge English: C1 Advanced (CAE)

photosynthesis

IPA: //ˌfoʊtəʊˈsɪnθəsɪs//

KK: /ˌfoʊtəʊˈsɪnθəsɪs/

noun

Definition: The process by which green plants and some other organisms use light to make food from carbon dioxide and water, producing oxygen as a byproduct.

Example: Photosynthesis is essential for life on Earth as it provides oxygen and food for many organisms.

photosynthesize

IPA: //ˌfoʊtəʊˈsɪnθəsaɪz//

KK: /ˈfoʊtoʊsɪnθəˌzaɪz/

intransitive verb

Definition: To carry out the process by which green plants and some other organisms use sunlight to make food from carbon dioxide and water.

Example: Plants can photosynthesize, turning sunlight into energy.

transitive verb

Definition: To create food using sunlight, water, and carbon dioxide, a process mainly done by plants.

Example: Plants can photosynthesize to produce their own food.

photosynthetic

IPA: /ˌfoʊtəʊsɪnˈθɛtɪk/

KK: /ˌfoʊtəʊsɪnˈθɛtɪk/

adjective

Definition: Relating to the process by which green plants and some other organisms use sunlight to make food from carbon dioxide and water.

Example: Plants are photosynthetic organisms that convert sunlight into energy.

photosystem

IPA: /ˈfoʊtəˌsɪtəm/

KK: /ˈfoʊtəˌsɪtəm/

noun

Definition: A biochemical system in chloroplasts that plays a key role in the process of converting light energy into chemical energy during photosynthesis.

Example: The photosystem is essential for plants to convert sunlight into energy.

phototaxis

IPA: //ˌfoʊtəˈtæksɪs//

KK: /ˈfoʊtoʊˌtæksɪs/

noun

Definition: The movement of a living thing towards or away from light.

Example: Many plants exhibit phototaxis by growing towards the sunlight.

phototelegraphy

IPA: //ˌfoʊtəʊtɛlɪˈɡræfi//

KK: /fōtōtəlɛˈgræfi/

noun

Definition: A system that transmits images or documents over a distance using electrical signals, often associated with early forms of fax technology.

Example: The invention of phototelegraphy revolutionized communication by allowing documents to be sent quickly over long distances.

phototoxicity

IPA: /ˌfoʊtəʊˈtɒksɪti/

KK: /fōˌtōkˈsɪkɪti/

noun

Definition: A harmful reaction that occurs when the skin or body is exposed to light, particularly sunlight, often resulting in skin damage or other negative effects.

Example: Some medications can cause phototoxicity, leading to severe sunburns even with minimal sun exposure.

phototransistor

IPA: //ˌfoʊtəʊtrænˈzɪstə//

KK: /ˈfoʊtoʊtrænˌzɪstər/

noun

Definition: A type of electronic component that can detect light and convert it into an electrical signal.

Example: The phototransistor is commonly used in light sensors and optical communication devices.

phototropic

IPA: //ˌfoʊtəˈtroʊpɪk//

KK: /fōˈtōtrōpik/

adjective

Definition: This word describes something that tends to move or grow in response to light, often used in relation to plants or organisms that react to light sources.

Example: Plants are phototropic, bending towards the sunlight to maximize their growth.

phototropism

IPA: //ˌfoʊtəˈtroʊpɪzəm//

KK: /ˈfoʊtəˌtroʊpɪzəm/

noun

Definition: The way a plant or organism grows or moves in response to light, usually towards it.

Example: The sunflower exhibits phototropism by turning its head to follow the sun throughout the day.

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