Explain why pneumonia is often a life-threatening disease.

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

How does an angiosperm prevent self pollination

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?