Which best describes secondary succession?
a. the quick change in an area’s species before a disturbance
b. the quick change in an area’s species after a disturbance
c. the gradual change in an area’s species after a disturbance
d. the gradual change in an area’s species before a disturbance

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

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?