chapter 8 micro

Microbial growth is...

• an increase in the number of cells that require chemical and physical requirements

• increase in cells size that require chemical and physical requirements

What are the chemical requirements for growth

• carbon

• oxugen

• nitrogen

• iron

Answer explanation

also include sulfur, phosphorus, and trace elements

Nutrients provide ________ and building blocks for growth and survival

The element, __________, provides the backbone of all organic molecules

Carbon has two sources, which are...

• CO2

• Organic compounds

• CO

• CCl4

Organisms that use CO2 as a carbon source are considered

• inorganic

• autotrophs

• heterotrophs

• organic

Organisms that use organic compounds as a carbon source are considered ______________

True or false? Based on energy source, organisms are either phototrophs or chemotrophs

• true

• false

A ______________ uses light energy and CO2

A _______________ uses chemical compounds, inorganic molecules, and CO2