Gen 1 có hiệu số giữa g và t là 20 phần trăm tống số nu .tính tỉ lệ phần trăm của từng nu

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

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals