How is tree sap created?

How does cherry tree cross pollination occur and what are the benefits of this process for cherry tree cultivation? Does the morning glory have a weak or strong stem? How can I effectively get rid of black bugs on tomato leaves? What pigments are in grass? How can I properly prune a Ficus elastica plant to promote healthy growth and maintain its desired shape? What is an adaptation for balsam fir? Is Sullivan a type of flower? Is ornamental corn edible? What is the theme of the story zebra by Chaim potok? Does the spruce tree keep leaves all winter long? How can I successfully care for a Norfolk Island Pine indoors? What small fish eat seaweed? How can I promote healthy lemon tree growth in my garden? What does the carrying of seeds to a new place? Are potatoes seeds or tubers? What is the symbolism of bulrush plant? Where does western red cedar wood come from? What part of a plant could be considered to highway for getting water and nutrients to the leaves? Your pony tale palm tree has a white fungus on it how do you kill it? What do carrots look like when they start growing?