Select all that apply.

which of the following are vertebrates?

starfish

earthworms

tunicates

crab

amphibians

lancelets

octopus

grasshopper

The rate at which molecules water and oxygen can enter a cell is determined by the-

Which of these statements are true about scientific theories and hypothesis

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