Question

1. The patient with rifampin-resistant tuberculosis, what evidence indicated that the resistant strain evolved within the patients own lungs rather than being acquired from another individual?

2. beak size in the Galapagos finches evolved in response to the amount of rainfall, which changes ever year. How can the finches cope with this lack of consistency? What would happen if climate change causes a consistent increase in the amount of rainfall?

3. imagine a population of an organism where the selection pressure for a given trait is high, but the average value of the trait does not change from generation to generation. Under what circumstances could you imagine this happening? for an example, imagine a species of sexually reproducing animal with males that produce large sperm. In this species, natural selection favors even bigger sperm, meaning individuals with the biggest sperm leave more offspring than those that have smaller sperm. However, sperm size does not change in the population. why?

Answer 1