How does an insect species become resistant to an insecticide?
the more exposure an insect has to the insecticide the weaker the effects of it are.
after an exposure if the insect survives, it mutates to become resistant if it encounters it again.
there are some offspring already resistant to the insecticide's effects that survive and reproduce.
after exposure, all the reproductive cells have mutated to become resistant for the next generation.

Which of the following diseases may be transmitted through an accidental needle stick? a. syphilis b. tuberculosis c. cellulitis d. hepatitis b

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

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above