Use the drop-down menus to determine whether the following barriers are physical, chemical, or biological. chemical
lysozyme

skin

phagocytes

Langerhans cells

acid and oil secretions

sneezing or coughing

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?