How are tree affected when temperature decreases?

In the new England states during fall, tours are conducted to see the beautiful fall foliage.  What causes this spectacular display?

How can insects make plants more susceptible to pathogens?

What information is used by plants to determine if they are growing in the shade or the open canopy? How does a“sun plant” respond once it detects that it is growing in the shade? How Is this different from the response you would expect from a“shade plant”?

How do the roles of xylem and phloem differ?

Briefly explain destarched plant.

Name some of the brightest environments. Describe some protective adaptations that plants may use to shade themselves.