Viruses and Bacteria....Get the Big Picture.... Chapter 21
Viruses are much smaller than bacteria.
They are not an ancient life form. Viruses
can cause diseases like the flu or chicken
pox. Most biologists agree that viruses are
are not alive. Viruses do not move, grow, or
carry out respiration. Viruses need living
host cells to reproduce.
Bacteria are the oldest forms of life.
They were the only life forms until about
2.1 billion years ago. Other life forms
evolved from bacteria. Bacteria grow,
reproduce, and carry out respiration.
Viruses and Bacteria....Get the Big Picture.... Chapter 21
1. Viruses are not the oldest life form on earth.
2. Bacteria can grow reproduce and carry out respiration.
3. Bacteria are the oldest life form on earth
4. Most biologist agree viruses are not alive.
5. Bacteria are alive.
6. Viruses do not move grow or carry out respiration.
7. Viruses need a living host to reproduce.
8. Other life forms evolved from bacteria
Viruses are much smaller than bacteria.
They are not an ancient life form. Viruses
can cause diseases like the flu or chicken
pox. Most biologists agree that viruses are
are not alive. Viruses do not move, grow, or
carry out respiration. Viruses need living
host cells to reproduce.
Bacteria are the oldest forms of life.
They were the only life forms until about
2.1 billion years ago. Other life forms
evolved from bacteria. Bacteria grow,
reproduce, and carry out respiration.
Viruses and Bacteria....Get the Big Picture.... Chapter 21
1. Viruses are not the oldest life form on earth.
2. Bacteria can grow reproduce and carry out respiration.
3. Bacteria are the oldest life form on earth
4. Most biologist agree viruses are not alive.
5. Bacteria are alive.
6. Viruses do not move grow or carry out respiration.
7. Viruses need a living host to reproduce.
8. Other life forms evolved from bacteria