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Questions and Answers
Why is there controversy about whether viruses are truly alive or not?
Why is there controversy about whether viruses are truly alive or not?
- They exhibit audible sounds
- They do not show molecular movement (correct)
- They grow over time
- They have colorful leaves
What is a common evidence for being alive according to the text?
What is a common evidence for being alive according to the text?
- Visible movement (correct)
- Invisible molecular movement
- Colorful leaves
- Audible sounds
What is a characteristic of some plants that may lead people to think they are alive?
What is a characteristic of some plants that may lead people to think they are alive?
- They exhibit audible sounds
- They show rapid movement
- They are green (correct)
- They change colors frequently
Why do some biologists consider molecular movements necessary for life?
Why do some biologists consider molecular movements necessary for life?
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What is mentioned as an example of invisible movement according to the text?
What is mentioned as an example of invisible movement according to the text?
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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.
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