Leaf bigs change their color so that they can conceal themselves from predatory animals
It is a chemical change, a degradation of the compounds from the leaf.
Both, for the bug to exhibit an external change (its color), there must first be an internal change that triggers the color change (its color). Thus, the internal change facilitates the external change. The predator is an external factor that causes an internal reaction (maybe it's fear) in the bug, that internal reaction then triggers an external factor which is the change in color. Just a personal opinion.
The change is leaf color is a chemical change.
it changes color in the fall
Pœrilocapsus lineatus
An ash-gray leaf bug is an insect in the family Piesmatidae.
Florida leaf-footed bug was created in 1775.
yes so bug off
Iodine turns a yellow-brown color when there is no starch present in a leaf. This color change indicates the absence of starch, which is detected by the iodine as it interacts with the leaf's compounds.
i do not know
carbon dioxide
When starch is added to leaves, it disrupts the natural pigments responsible for leaf coloration, particularly chlorophyll, which gives leaves their green color. This interference can cause the leaves to lose their green color and change to a different color, depending on other remaining pigments present in the leaf.