5 Questions
Why is there controversy about whether viruses are truly alive or not?
They do not show molecular movement
What is a common evidence for being alive according to the text?
Visible movement
What is a characteristic of some plants that may lead people to think they are alive?
They are green
Why do some biologists consider molecular movements necessary for life?
Molecular movements are essential for life processes
What is mentioned as an example of invisible movement according to the text?
Movements of molecules
Study Notes
Characteristics of Life
- There is controversy about whether viruses are truly alive or not due to their inability to reproduce on their own and requiring a host cell to replicate.
Evidence of Being Alive
- A common evidence for being alive is the ability to grow, respond to stimuli, reproduce, metabolize, and maintain homeostasis.
Plant Characteristics
- Some plants have tropisms, which are growth responses to stimuli, leading people to think they are alive.
Molecular Movements and Life
- Some biologists consider molecular movements necessary for life, as they are essential for metabolic processes and maintaining cellular functions.
Invisible Movement
- Brownian motion is mentioned as an example of invisible movement, which is the random movement of particles suspended in a fluid due to thermal energy.
Test your knowledge on identifying living organisms and understanding the characteristics of life. This quiz covers topics such as respiration, movement, and attributes of living beings.
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