Science — English

What is the primary purpose of mucus in the respiratory system?
The primary purpose of mucus in the respiratory system is to trap and remove foreign particles and bacteria. It helps...
Added: 18 Mar 2000
Updated: 17 Nov 2025
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What is the term for the variable that is changed in an experiment?
The term for the variable that is changed in an experiment is called the independent variable. This variable is manipulated...
Added: 18 Mar 2000
Updated: 05 Nov 2025
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In geology, what is the term for the slow build-up of pressure in the Earth's crust?
In geology, the term for the slow build-up of pressure in the Earth's crust is stress. This stress accumulates due...
Added: 18 Mar 2000
Updated: 16 Nov 2025
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What is the chemical basis for the color change in leaves during autumn?
The chemical basis for the color change in leaves during autumn is primarily due to the breakdown of chlorophyll. As...
Added: 18 Mar 2000
Updated: 09 Nov 2025
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What is the basic unit of measure for temperature on the Celsius scale?
The basic unit of measure for temperature on the Celsius scale is the degree Celsius (°C). This scale is based...
Added: 18 Mar 2000
Updated: 16 Nov 2025
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What is the structure called that allows plants to absorb sunlight for photosynthesis?
The structure that allows plants to absorb sunlight for photosynthesis is called a chloroplast. These organelles contain the pigment chlorophyll,...
Added: 18 Mar 2000
Updated: 15 Nov 2025
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What is the process by which an enzyme speeds up a biochemical reaction?
The process by which an enzyme speeds up a biochemical reaction is known as enzyme catalysis. Enzymes act as biological...
Added: 18 Mar 2000
Updated: 11 Nov 2025
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What is the mineral that is hardest naturally occurring on Earth?
The mineral that is hardest naturally occurring on Earth is diamond. Diamonds are a crystalline form of carbon, known for...
Added: 18 Mar 2000
Updated: 05 Nov 2025
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What type of science focuses on the study of matter and its interactions?
The type of science that focuses on the study of matter and its interactions is known as physics. Physics explores...
Added: 18 Mar 2000
Updated: 17 Nov 2025
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What is the study of ecosystems at varying scales called?
The study of ecosystems at varying scales is called ecosystem ecology. This area of ecological research examines the interactions between...
Added: 18 Mar 2000
Updated: 08 Nov 2025
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What is the primary purpose of chloroplasts in plant cells?
The primary purpose of chloroplasts in plant cells is to conduct photosynthesis, a process that converts light energy into chemical...
Added: 18 Mar 2000
Updated: 24 Nov 2025
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What is the chemical process occurring in the liver to produce glucose called?
The chemical process occurring in the liver to produce glucose is called gluconeogenesis. This metabolic pathway generates glucose from non-carbohydrate...
Added: 18 Mar 2000
Updated: 02 Nov 2025
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What is the term for substances that cannot be created or destroyed?
The term for substances that cannot be created or destroyed is the law of conservation of mass. This fundamental principle...
Added: 18 Mar 2000
Updated: 27 Nov 2025
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What is the significance of the theory of plate tectonics in geology?
The significance of the theory of plate tectonics in geology lies in its explanation of Earth's surface dynamics, including the...
Added: 18 Mar 2000
Updated: 08 Nov 2025
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What is the term used to describe organisms that cannot produce their own food and must consume others?
The term used to describe organisms that cannot produce their own food and must consume others is heterotrophs. These organisms...
Added: 18 Mar 2000
Updated: 01 Dec 2025
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What is the major organ for detoxification in the human body?
The major organ for detoxification in the human body is the liver. It processes blood coming from the digestive tract,...
Added: 18 Mar 2000
Updated: 06 Nov 2025
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What is the basic concept of evolution by natural selection?
The basic concept of evolution by natural selection posits that individuals with advantageous traits are more likely to survive and...
Added: 18 Mar 2000
Updated: 22 Nov 2025
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What is the term for a species that plays a crucial role in the way an ecosystem functions?
The term for a species that plays a crucial role in the way an ecosystem functions is called a keystone...
Added: 18 Mar 2000
Updated: 28 Nov 2025
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What is the primary product of the Krebs cycle in cellular respiration?
The primary product of the Krebs cycle in cellular respiration is ATP (adenosine triphosphate) along with NADH and FADH2. This...
Added: 18 Mar 2000
Updated: 21 Nov 2025
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What is the name of the equation used to calculate the energy of a photon?
The name of the equation used to calculate the energy of a photon is E = hf, where E denotes...
Added: 18 Mar 2000
Updated: 25 Nov 2025
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