Water should not touch seed directly. What growth occurs first, second, etc. This may be extended, by replanting in soil and following with observations until a flower appears. Compare data from prior lessons. Parts of some animals change and meet their immediate needs to survive.
Plants adapt to their environment when conditions change.
Observe a plant over a period of a day or longer. Note the change of position as the direction of light changes. Plants depend on the sun and animals depend on plans. Ask how can we verify plants really need the sun. Suggest and experiment.