I need help with this science quiz

Why do you think the puppy litter was all dark-haired?

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?

Write the balanced chemical equation forphotosynthesis.