White eye color is an X-linked trait in one line of fruit flies. White eyes is recessive to red eyes. If a red-eyed female and a white-eyed male are crossed, .

answer; both surfaces of the membrane are nonpermeable

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

u can get stuck if wrong may u pls give mt the optians

explanation: