Answer:
The answer is Physical. Physical immunity occurs when a person immune system responds to antigen.
Explanation:
The correct answer is: a. the agar and air in the petri dish are providing all of the resources needed by the bacteria.
There are four phases of bacterial growth:
1. Lag phase-bacteria prepare for reproduction
2. Log phase- cell doubling
3. Stationary phase- due to a growth-limiting factor
4. Death phase.
D)Oxygen diffuses from alveolar sacs to blood in capillaries
