the atmosphere provides the biosphere with necessary gases to live and breathe this is an example of how earths spheres are

The energy needs of a human population are not affected by

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?

What is the ecological role of food chains and food webs