Bacteria

Bacteria are ubiquitous, found in diverse environments from the Earth's crust to living organisms. While some bacteria cause diseases, others are beneficial. In fact, the human body contains ten times more bacterial cells than human cells, making up 90% of our body's cellular composition.

What is a fundamental process that bacteria undergo?

• Respiration

• Simple cell division

• Fermentation

• Photosynthesis

Where can bacteria be found?

• Only in water

• Only in soil

• In all habitats, including extreme ones

• Only in the human body

What is one potential impact of bacteria on humans?

• They can only cause diseases

• They are always beneficial

• They have no impact

• They can cause illness

How does the number of bacteria in the human body compare to human cells?

• There are fewer bacteria than human cells

• There are 10 times more bacteria than human cells

• The number is equal

• There are twice as many human cells as bacteria

What percentage of the human body is made up of bacteria?

• 70%

• 90%

• 50%

• 30%