After 100 generations of being separated , do you think the island and mainland bird population would become two different species? Population is mixed with long and short beaks.

your answer is "the 1950's"

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)