Cyanobacteria are a group of photosynthetic bacteria. These bacteria use sunlight as their energy source and carbon dioxide as their carbon source. Cyanobacteria are ________________.

Biologists can divide living organisms into two groups:autotrophs and heterotrophs, which differ in _________.

Organisms that use organic molecules as their source of carbon are called:

Organisms that use CO₂ as their source of carbon are called

Chemoheterotrophs:

Humans are:

Organisms that require oxygen for metabolism are referred to as…

Organisms that are indifferent to the presence of oxygen are…

______________ are complex communities of various types of microbes that adhere to surfaces.