All vertebrates have general sensors in their skin for touch, pressure, and pain. these are called olfactory receptors chemoreceptors photoreceptors mechanoreceptors

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

What is the next step in the process after a substrate enters the active site of an enzyme