Physical change as no new substance is created
Dna holds information for the cells that make up an offsprings body and traits. A parents' genes will pass on this way.
There can only be one because hes at the top of his food chain
Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.