What advancements helped Earth’s human population to grow so quickly?

Look at the photo of the leaf. which term best describes this leaf?

How does secondary succession differ from primary succession?

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?