Science — English

What is the primary purpose of the respiratory system in animals?
The primary purpose of the respiratory system in animals is to facilitate the exchange of gases, primarily oxygen and carbon...
Added: 12 Apr 2000
Updated: 16 Nov 2025
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What do you call the evolutionary process by which species adapt to their environment over time?
The evolutionary process by which species adapt to their environment over time is called natural selection. This mechanism, proposed by...
Added: 12 Apr 2000
Updated: 29 Nov 2025
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What structure within the cell is responsible for energy production?
The structure within the cell responsible for energy production is the mitochondrion. Often called the "powerhouse of the cell," mitochondria...
Added: 12 Apr 2000
Updated: 24 Nov 2025
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What is the term for a change that occurs without the addition of external energy?
A change that occurs without the addition of external energy is referred to as a spontaneous change. These changes arise...
Added: 12 Apr 2000
Updated: 17 Nov 2025
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What is the function of the lymphatic system?
The function of the lymphatic system is to maintain fluid balance, support the immune system, and facilitate the absorption of...
Added: 12 Apr 2000
Updated: 28 Nov 2025
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What is the term for the seasonal movement of animals?
The term for the seasonal movement of animals is migration. Many species migrate in search of better climates, food sources,...
Added: 12 Apr 2000
Updated: 01 Dec 2025
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What is the primary type of energy obtained from fossil fuels?
The primary type of energy obtained from fossil fuels is thermal energy, which is often converted into mechanical energy for...
Added: 12 Apr 2000
Updated: 01 Nov 2025
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What part of the respiratory system is responsible for gas exchange?
The part of the respiratory system responsible for gas exchange is the alveoli. These tiny, balloon-like structures are located at...
Added: 12 Apr 2000
Updated: 09 Nov 2025
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What is the term for organisms that occupy the same niche in different environments?
The term for organisms that occupy the same niche in different environments is known as ecological equivalents. These organisms share...
Added: 12 Apr 2000
Updated: 08 Nov 2025
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What is the primary nutrient source for primary producers?
The primary nutrient source for primary producers is sunlight, which they utilize in the process of photosynthesis. These organisms, primarily...
Added: 12 Apr 2000
Updated: 27 Nov 2025
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What is the biological significance of pheromones?
The biological significance of pheromones lies in their role as chemical signals that facilitate communication among individuals of the same...
Added: 12 Apr 2000
Updated: 20 Nov 2025
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What is the primary purpose of chemical reactions?
The primary purpose of chemical reactions is to transform reactants into products through the breaking and forming of chemical bonds....
Added: 12 Apr 2000
Updated: 03 Nov 2025
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What is the term for the chemical transformation of substances?
The term for the chemical transformation of substances is known as a chemical reaction. In a chemical reaction, reactants undergo...
Added: 12 Apr 2000
Updated: 28 Nov 2025
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What is the main factor affecting the rate of photosynthesis?
The main factor affecting the rate of photosynthesis is light intensity. Photosynthesis is the process by which plants, algae, and...
Added: 12 Apr 2000
Updated: 14 Nov 2025
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What is the basic principle behind entropy?
The basic principle behind entropy is that in any energy transfer or transformation, there is a tendency for systems to...
Added: 12 Apr 2000
Updated: 28 Nov 2025
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What is the term for the scientific study of patterns in nature?
The scientific study of patterns in nature is known as natural history. This interdisciplinary field explores the observation, description, and...
Added: 12 Apr 2000
Updated: 17 Nov 2025
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What is the process by which pollutants accumulate in living organisms called?
The process by which pollutants accumulate in living organisms is called bioaccumulation. This phenomenon occurs when organisms absorb and retain...
Added: 12 Apr 2000
Updated: 08 Nov 2025
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What is the importance of mycorrhizae in plant nutrition?
Mycorrhizae are symbiotic associations between fungi and plant roots that significantly enhance plant nutrition. These fungi extend the root system...
Added: 12 Apr 2000
Updated: 19 Nov 2025
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What is the primary feature of electrical resistance in a circuit?
The primary feature of electrical resistance in a circuit is its ability to oppose the flow of electric current. Measured...
Added: 12 Apr 2000
Updated: 04 Nov 2025
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What is the term for the study of genetic variation in populations?
The scientific study of genetic variation in populations is referred to as population genetics. This field examines the distribution and...
Added: 12 Apr 2000
Updated: 25 Nov 2025
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