When earth formed , its high temperature was not due to

a. heat produced when planetesimals collided with one another

b. heat generated when the increasing weight of its outer layers compressed its inner layers

c. the conversion of moving radioactive particles into heat energy

d. an irregular orbit that brought it closer to the sun

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?