What is the correct order of structures in a chromosome from smallest to largest?

What is the broadest level of classification of life

This is so important ugh its 25 points

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?