24.2

Question 1

Heterotrophic saprophyte?

Answer 1

Heterotrophic bacteria that feed on dead and decaying material.

Question 2

Photoautotroph? Example.

Answer 2

Bacteria that use sunlight as an energy source. Ex. Cyanobacteria. These use light-trapping compounds to obtain energy, similar to plants.

Question 3

Obligate anaerobes? Example. What does this bacteria cause?

Answer 3

They cannot survive in the presence of oxygen. The obligate anaerobe, Clostridium tetani causes tenanus.

Question 4

Facultative anaerobes? Example.

Answer 4

Can live with or without oxygen. Esherichia cole (common in uman digestive tract) is an example.

Question 5

Obligateaerobes? Example. Where does it live?

Answer 5

Bacteria that cannot survive without oxygen. Ex. Mycobacterium tuberculosis lives in the lungs and causes tuberculosis.

Question 6

Thermophilic?

Answer 6

These bacteria grow best in temperatures between 40 degrees celcius to 110 degrees celcius. pH is perfered at 6.0 or lower (for certain species, like those used to produce yogurt).