Which of the following is correct concerning self-splicing introns? none of these answers are correct. group ii introns use an exogenous guanosine as a cofactor. group i introns form a lariat structure. group i introns use an exogenous adenine as a cofactor. group i introns are found across all organisms, including vertebrates.

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

When plants use sunlight to make food, the energy of sunlight is

2. which is the last step in the scientific method?