Disease Ch. 20 Biology

Cause of the disease:

• agent

• time

• host

Organisms that are exposed to and harbor a disease

• environment

• agent

• host

External conditions that allow a disease to be transmitted

• time

• environment

• agent

Incubation period, duration of illness, or period from initial infection to epidemic

• environment

• agent

• time

Infectious diseases are transmitted from organism to organism, not inherited

• true

• false

What is this called?

• staphylospirillum

• streptococcus

• diplobacillus

What is this?

• staphylospirillum

• streptococcus

• diplobacillus

What is this?

• staphylospirillum

• diplobacillus

• streptococcus

Bacteria that have a thick peptidoglycan layer and hold violet stains

• gram-negative

• gram-positive

• both a and b are correct

Bacteria that have a thin peptidoglycan layer, but are more resistant to antibiotics due to protective outer membrane/cell wall

• both a and b are correct

• gram-positive

• gram-negative