What are culture and sensitivity tests used for? to determine the type of microbe present in an exudate to provide a specific medium that supports maximum microbial growth to identify the causative microbe and the effective antimicrobial agent for it to provide living host cells for microbes requiring such for replication

To identify the causative microbe and the effective antimicrobial agent for it

Explanation:

As the name implies, Culture test in microbiology helps to DISCOVER/IDENTIFY the KIND of micro organisms involved in an infection; while Sensitivity tests TELLS the how best to COUNTER the resulting disease effects

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles