How does genetic variation affect the chance that a population will survive changing environmental conditions

If you were given a map of the sensory cortex in the postcentral gyrus of the cerebrum, do you think the map would have more “space” devoted to the regions of the body that have the highest density of sensory receptors, or the regions of the body that have the lowest density of sensory receptors? explain

What two conditions must be present for osmosis to occur?

Which of these chinese regions is the most densely populated?