Science — English

What is the mechanism by which the heart pumps blood?
The mechanism by which the heart pumps blood involves cardiac cycles consisting of systole and diastole. During systole, the heart...
Added: 27 Feb 2000
Updated: 30 Nov 2025
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What is the chemical composition of the human bone?
The chemical composition of human bone primarily consists of calcium phosphate as hydroxyapatite, along with various proteins like collagen. This...
Added: 27 Feb 2000
Updated: 19 Nov 2025
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What is the evolutionary significance of adaptive radiation?
The evolutionary significance of adaptive radiation lies in its ability to produce diverse forms from a common ancestor in response...
Added: 27 Feb 2000
Updated: 08 Nov 2025
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What process do organisms undergo to adapt to changes in their environment?
The process organisms undergo to adapt to changes in their environment is called evolution. Through mechanisms such as natural selection,...
Added: 27 Feb 2000
Updated: 02 Nov 2025
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What is the principle of flotation based on?
The principle of flotation is based on the concept of buoyancy, which states that an object will float if it...
Added: 27 Feb 2000
Updated: 16 Nov 2025
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What are the primary colors of light according to additive color mixing?
The primary colors of light according to additive color mixing are red, green, and blue (RGB). When combined in different...
Added: 27 Feb 2000
Updated: 24 Nov 2025
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What is the term for the breakdown of organic matter by living organisms?
The term for the breakdown of organic matter by living organisms is decomposition. This process involves the action of microorganisms...
Added: 27 Feb 2000
Updated: 10 Nov 2025
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What is the natural phenomenon that causes ocean currents?
The natural phenomenon that causes ocean currents includes factors such as wind, water density differences, and the Earth's rotation. These...
Added: 27 Feb 2000
Updated: 19 Nov 2025
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What role does chlorophyll play in photosynthesis?
Chlorophyll plays a critical role in photosynthesis by absorbing light energy, primarily in the blue and red wavelengths. This pigment...
Added: 27 Feb 2000
Updated: 19 Nov 2025
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What is the scientific basis for the classification of living organisms?
The scientific basis for the classification of living organisms is known as taxonomy. This framework categorizes organisms into hierarchical groups...
Added: 27 Feb 2000
Updated: 27 Nov 2025
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What is the purpose of an electron microscope?
The purpose of an electron microscope is to achieve extremely high resolution imaging of biological and non-biological specimens. By using...
Added: 27 Feb 2000
Updated: 02 Nov 2025
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What is the primary energy currency for cells?
The primary energy currency for cells is adenosine triphosphate (ATP). ATP is produced during cellular respiration and provides energy for...
Added: 27 Feb 2000
Updated: 26 Nov 2025
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What is the term for the genetic composition of an organism?
The term for the genetic composition of an organism is genotype. It encompasses all the genes and alleles within an...
Added: 27 Feb 2000
Updated: 20 Nov 2025
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What is the unit for measuring light intensity?
The unit for measuring light intensity is the lux. Lux quantifies the illuminance or the amount of light that hits...
Added: 27 Feb 2000
Updated: 04 Nov 2025
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What is the term for collective interactions among species in an ecosystem?
The term for collective interactions among species in an ecosystem is community. This concept encompasses various relationships, including predation, competition,...
Added: 27 Feb 2000
Updated: 18 Nov 2025
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What is the primary factor that influences the rate of photosynthesis?
The primary factor that influences the rate of photosynthesis is light intensity. As light levels increase, the rate of photosynthesis...
Added: 27 Feb 2000
Updated: 08 Nov 2025
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What is the primary role of the muscular system in animals?
The primary role of the muscular system in animals is to facilitate movement. Muscles contract and relax to produce motion,...
Added: 27 Feb 2000
Updated: 19 Nov 2025
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What type of mutation occurs when one base pair is replaced by another?
A point mutation occurs when one base pair in the DNA sequence is replaced by another. This type of mutation...
Added: 27 Feb 2000
Updated: 19 Nov 2025
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What is the significance of homologous structures in evolution?
Homologous structures are significant in evolution as they indicate a common ancestor among different species. These structures, although they may...
Added: 27 Feb 2000
Updated: 24 Nov 2025
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What is the study of the relationships between organisms and their physical environments called?
The study of the relationships between organisms and their physical environments is called ecology. This field examines how organisms interact...
Added: 27 Feb 2000
Updated: 15 Nov 2025
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