What is the term used to describe the number of individuals moving into a population?

The influenza virus cause the flu, but not other diseases. why?

Astudent analyzed ears of corn that demonstrated two traits in the f2 kernels, purple or white colors and smooth on wrinkled shapes. a tabulation of 135 individual kernels gave the following results: purple and smooth = 75 white and smooth = 28 purple and wrinkled = 24 white and wrinkled = 8 what would be the only phenotype present in the f1 ger

Which atmospheric later is where earths northern and southern lights occur