Final answer:
High-density conditions caused no noticeable change in the behavior of wood frog tadpoles.
Step-by-step explanation:
The statement is true. High-density conditions caused no noticeable change in the behavior of Rana sylvatica (wood frog) tadpoles. These tadpoles were used in an experiment to study the effects of high-density conditions on their behavior. The results showed that the behavior of the tadpoles remained consistent even in high-density environments.