The word “prokaryote” comes from Greek meaning _______.

Prokaryotes lack a _______.

Archaea live mainly in _______ environments.

Bacteria and archaea differ because archaea lack _______.

Methanogens produce _______ as a waste product.

Halophiles thrive in environments with _______.

Thermoacidophiles live in environments that are both _______ and _______.

Bacteria have cell walls containing _______.

Gram-positive bacteria have _______ peptidoglycan and appear _______ when stained.

The genetic material of a bacterium is found in the _______.

Small circular pieces of DNA found in bacteria are called _______.

The plasma membrane controls what _______ and _______ the cell.

The capsule helps bacteria _______.

Pili are used for _______.

The flagellum’s main function is _______.

The cytoplasm is the site for _______ and _______.

Bacterial ribosomes produce _______.

Spherical bacteria are called _______.

Rod-shaped bacteria are called _______.

Spiral-shaped bacteria are called _______.

Streptococci occur in _______.

Staphylococci occur in _______.

Most bacteria reproduce by _______.

Binary fission produces _______ daughter cells.

Obligate aerobes require _______ to survive.

Obligate anaerobes die in the presence of _______.

Facultative anaerobes can live _______.

Autotrophs make their own _______.

Photoautotrophs use _______ for energy.

Chemoautotrophs use _______ compounds for energy.

Some bacteria form _______ to survive harsh conditions.

Mutations in bacterial DNA can lead to _______.

Bacteria that decompose organic material are called _______.

Nitrogen-fixing bacteria convert nitrogen gas into forms usable by _______.

The bacteria living naturally in and on our bodies are called _______.

Some gut bacteria produce _______ which helps with blood clotting.

Only a small percentage of bacteria are _______.

Pathogenic bacteria can cause disease by _______.

Botulism affects the _______ system.

A virus is composed of _______ surrounded by a protein coat.

Viruses are considered nonliving because they cannot _______.

The outer protein layer of a virus is called a _______.

Viruses that infect bacteria are called _______.

A virus enters a host cell by attaching to specific _______.

The lytic cycle results in _______.

The lysogenic cycle involves the viral DNA _______.

Retroviruses contain _______ as genetic material.

HIV is an example of a _______.

A prion is a _______ that causes disease.