Which of the following two physical components do the sun and the earth have in common?

1. core and mantle
2. core and atmosphere
3. crust and atmosphere
4. mantle and crust

What type of competition exsist between two species. turtles and fish

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?