Discuss with students the questions:
How does phototropism adapt a plant for survival?
How does geotropism adapt a plant for survival?
How does thigmotropism adapt a climbing plant for survival?
How does photomorphogenesis adapt a plant for survival?
In each case, have students consider what would happen in the absence of the ability.
How do these mechanism work? Since the plant has no obvious sense organs or nervous system, the mechanism of how these responses work is entirely different from that in animals. More information regarding how they work is available, but details are still under investigation.