Which option is not an organism?
Responses
tree
tree
bacteria
bacteria
human
human
virus
virus
What is a virus?
A virus is a microscopic infectious agent that can only replicate inside the cells of living organisms. It consists of genetic material (either DNA or RNA) enclosed in a protein coat. Unlike organisms, viruses cannot carry out metabolism or reproduce independently, and they require a host to replicate and cause infection.
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The option that is not an organism is "virus."
To determine which option is not an organism, we need to understand what an organism is. An organism is a living entity that can perform basic life processes, such as growth, reproduction, and response to stimuli. Let's analyze each option:
1. Tree: A tree is a living organism. It undergoes growth, reproduces, and responds to environmental stimuli. Therefore, a tree is an organism.
2. Bacteria: Bacteria are microscopic, single-celled organisms. They fulfill all the criteria of being living entities, as they grow, reproduce, and respond to stimuli. Therefore, bacteria are also organisms.
3. Human: Humans are complex, multicellular organisms. They exhibit various life processes, such as growth, reproduction, and response to stimuli. Consequently, humans are organisms as well.
4. Virus: Viruses are a unique type of infectious agent that straddles the boundary between living and non-living entities. While they have some characteristics of living things, such as the ability to reproduce, they lack the ability to perform essential life processes independently. Viruses rely on host cells to replicate and cannot grow or respond to stimuli on their own. Therefore, viruses are not considered organisms.
Based on this analysis, the option that is not an organism is "virus".