Chameleons have a long tongue used to catch insects. The five toes on each foot are bound in two separate groups: one group of two toes and one group of three toes. This allows chameleons to grasp onto branches. Chameleons also have a flexible tail they use to hold onto branches, and they can change the color of their skin to communicate with other chameleons and for camouflage. Which statement about chameleons refers to the expression of a trait that is most influenced by the environment?
Answer
A
The chameleon has one of its two groups of toes around a branch.
B
The chameleon’s flexible tail is grasping a twig.
C
The chameleon’s long tongue is curled in its mouth.
D
The chameleon has skin that turned brown-red.
Explanation
Skin color is the trait described as changing in response to the environment and circumstances: chameleons can alter it for camouflage or communication. The toes, flexible tail, and long tongue are physical features, even when they are being used in a particular way. Therefore, the chameleon with brown-red skin shows the trait most influenced by the environment.
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