What is homeostasis?
Fall Semester Review

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Biology
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Homeostasis is the process by which a cell or organism maintains a stable internal environment despite changes in external conditions.
2.
FLASHCARD QUESTION
Front
How do cells maintain homeostasis?
Back
Cells maintain homeostasis by regulating what enters and leaves the cell, ensuring balance in their internal environment.
3.
FLASHCARD QUESTION
Front
What do viruses and living cells have in common?
Back
Both viruses and living cells store genetic information.
4.
FLASHCARD QUESTION
Front
What is the energy loss between trophic levels?
Back
Approximately 90% of energy is lost as heat between the trophic level of producers and primary consumers.
5.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.
6.
FLASHCARD QUESTION
Front
What is passive transport?
Back
Passive transport is the movement of molecules across a cell membrane without the use of energy, typically from an area of higher concentration to an area of lower concentration.
7.
FLASHCARD QUESTION
Front
What is diffusion?
Back
Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.
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