Science — English

What distinguishes a eukaryotic cell from a prokaryotic cell?
Eukaryotic cells are distinguished from prokaryotic cells primarily by the presence of a nucleus and membrane-bound organelles. Eukaryotic cells, such...
Added: 15 Apr 2000
Updated: 28 Nov 2025
ℹ️
What is the term for the smallest unit of life?
The term for the smallest unit of life is a cell. Cells are the fundamental building blocks of all living...
Added: 15 Apr 2000
Updated: 19 Nov 2025
ℹ️
What is the primary method of energy transfer in a vacuum?
The primary method of energy transfer in a vacuum is through radiation. Unlike conduction or convection, which require a medium,...
Added: 15 Apr 2000
Updated: 10 Nov 2025
ℹ️
What structure in chloroplasts is the site of the Calvin cycle?
The site of the Calvin cycle in chloroplasts is the stroma. The stroma is a fluid-filled space surrounding the thylakoids...
Added: 15 Apr 2000
Updated: 12 Nov 2025
ℹ️
What is an example of an ecosystem engineer?
An example of an ecosystem engineer is the **beaver**. Beavers modify their environment by constructing dams, which create wetlands that...
Added: 15 Apr 2000
Updated: 05 Nov 2025
ℹ️
What is the term for a temporary reproductive state in bacteria?
The term for a temporary reproductive state in bacteria is **endospore formation**. In response to unfavorable environmental conditions, specific bacteria...
Added: 15 Apr 2000
Updated: 15 Nov 2025
ℹ️
What are the properties of acids and bases in chemistry?
The properties of acids and bases in chemistry include their ability to donate and accept protons, respectively. Acids produce hydrogen...
Added: 15 Apr 2000
Updated: 14 Nov 2025
ℹ️
What type of reaction occurs in a battery during discharge?
The type of reaction that occurs in a battery during discharge is an **oxidation-reduction reaction**, or redox reaction. In this...
Added: 15 Apr 2000
Updated: 14 Nov 2025
ℹ️
What is the primary factor that drives evolution according to the theory of natural selection?
The primary factor that drives evolution according to the theory of natural selection is **variation** among individuals in a population....
Added: 15 Apr 2000
Updated: 09 Nov 2025
ℹ️
What phenomenon occurs when light reflects off a surface?
The phenomenon that occurs when light reflects off a surface is known as reflection. This process allows us to see...
Added: 15 Apr 2000
Updated: 17 Nov 2025
ℹ️
What is a herbivore?
A herbivore is an animal that primarily consumes plants as its main source of food. This dietary classification includes a...
Added: 15 Apr 2000
Updated: 18 Nov 2025
ℹ️
What is the purpose of the scientific peer review process?
The purpose of the scientific peer review process is to ensure the credibility and quality of research before publication. It...
Added: 15 Apr 2000
Updated: 26 Nov 2025
ℹ️
What is the concept of energy transfer efficiency in an ecosystem?
The concept of energy transfer efficiency in an ecosystem refers to how much energy is passed from one trophic level...
Added: 15 Apr 2000
Updated: 17 Nov 2025
ℹ️
What role does sulfur play in biogeochemical cycles?
Sulfur plays a vital role in biogeochemical cycles, particularly in the sulfur cycle, where it is involved in the formation...
Added: 15 Apr 2000
Updated: 03 Nov 2025
ℹ️
What is the significance of cellulose in plant structure?
Cellulose is significant in plant structure as it provides rigidity and strength to cell walls. This complex carbohydrate is a...
Added: 15 Apr 2000
Updated: 25 Nov 2025
ℹ️
How does altitude affect the boiling point of water?
Altitude affects the boiling point of water by causing it to decrease as altitude increases. At higher elevations, the pressure...
Added: 15 Apr 2000
Updated: 20 Nov 2025
ℹ️
What is the importance of pollination in agriculture?
The importance of pollination in agriculture cannot be overstated, as it is crucial for the reproduction of many flowering plants....
Added: 15 Apr 2000
Updated: 22 Nov 2025
ℹ️
What is the role of the smooth endoplasmic reticulum in a cell?
The role of the smooth endoplasmic reticulum (SER) in a cell includes the synthesis of lipids and the metabolism of...
Added: 15 Apr 2000
Updated: 10 Nov 2025
ℹ️
What advantage do larger organisms have in terms of competition?
Larger organisms often have an advantage in competition due to their ability to dominate resources, both in terms of achieving...
Added: 15 Apr 2000
Updated: 10 Nov 2025
ℹ️
What is the significance of the food chain in ecology?
The significance of the food chain in ecology lies in its representation of energy flow and nutrient cycling within an...
Added: 15 Apr 2000
Updated: 24 Nov 2025
ℹ️