Questions and Answers
Which of the following is a key characteristic of life?
What makes the definition of viruses challenging?
Where does life exist on Earth?
When did life originate?
Signup and view all the answers
What did Empedocles propose about the composition of life?
Signup and view all the answers
Study Notes
Key Characteristics of Life
- Organization: having cells as the basic unit of life
- Metabolism: ability to carry out chemical reactions to maintain internal environment
- Homeostasis: ability to maintain a stable internal environment despite external changes
- Growth and Development: ability to grow, reproduce, and respond to stimuli
- Reproduction: ability to produce offspring
- Response to Stimuli: ability to react to internal and external stimuli
- Evolution: ability to adapt and change over time
Definition of Viruses
- Viruses are challenging to define because they do not meet all the key characteristics of life
- Viruses do not have cells, do not carry out metabolic processes, and do not respond to stimuli on their own
- Viruses require a host cell to replicate and exhibit characteristics of life
Life on Earth
- Life exists almost everywhere on Earth, from the surface to deep-sea vents
- Extreme environments such as hot springs, Antarctic ice sheets, and deep-sea trenches support life
Origin of Life
- The exact timing of life's origin on Earth is unknown, but it is believed to have occurred at least 3.5 billion years ago
- The earliest evidence of life on Earth dates back to around 3.4 billion years ago
Empedocles' Proposal
- Empedocles proposed that life is composed of four elements: earth, air, fire, and water
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge about the fundamental characteristics of life and philosophical concepts surrounding living systems in this engaging quiz. Explore topics such as homeostasis, metabolism, growth, and more. Challenge yourself and expand your understanding of what it means to be alive.
