*Question*
Q: Gram-positive and gram-negative bacteria are distinguished by thickness of what? Choices: - cell membrane - cell weight - cell length - cell wall A:
**Answer**
cell wall

*Question*
Q: What is the amount of force pushing against a given area? Choices: - inertia - power - energy - pressure A:
**Answer**
pressure

*Question*
Q: What term is used to describe the organism that is invaded and often harmed by a pathogen? Choices: - guardian - initial - parent - host A:
**Answer**
host

*Question*
Q: What type of behavior occurs naturally in all animals of a given species? Choices: - learned - observational - reflex - innate A:
**Answer**
innate