3. What percentage of the matter in the solar system does the sun contain? What does that statistic tell you about our sun? I have the first part.. I can't figure out the second- :( please help!
(i put it in biology since there is no Astronomy)

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?