Diatoms, like most phytoplankton, are much more abundant in the photic zone than in the aphotic zone. Which two factors found in the photic zone are the most essential for phytoplankton

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?