7th Grade Life Science

Bacteria : Simple one-celled organisms that do not have a nucleus

• Bacteria Are Alive!!! One cell carries out all life functions

• Bacteria have a Cell Wall-like plant cells

Flagellum: Hairlike structure used by bacteria to move

Bacteria locomotion

• Cannot move themselves: Carried in air and water

Can move themselves: Use Flagellum

Helpful Bacteria

• Decomposers: Breakdown dead organisms and make nutrients for living things to grow.
• Help make foods like Cheese and Yogurt

Harmful Bacteria

• Cause Diseases like strep throat, pneumonia, and Tuberculosis (TB)
• Food poisoning