The preliminary Gram stain of the specimen showed many Gram-positive cocci in clusters. After 24 hours, the TSA with 5% sheep blood plate demonstrated pure growth of small, round, smooth, white, gamma-hemolytic colonies. The same colony morphology was observed on the PEA (or CNA) plate with zero growth on the EMB (or MacConkey) plate. Colonies were also observed on the MSA plate, which was completely pink in color. What is meant by the term "pure growth"? What does it say regarding the quality of your specimen collection? Based upon these laboratory results, what microbe do you predict is causing Caitlyn’s infection? Explain. What two chemical tests would you perform next to verify your answer?

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

i think the answer would be a. after sentence 14! i hope i at least a little