Which phrase best summarizes the theory of evolution by natural selection? a. parent organisms pass on traits they have acquired during their lifetime. b. only the strongest animals survive. c. life must come from other life. d. populations change over long periods of time.

What do animals wth echolocation have in common other than echolocation

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

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks