Question

which statement best represents how structure relates to function? dogs can be taught to fetch. a tiger’s diet is composed of meat. some species of birds live longer than others. porcupines have quills to protect themselves from predators.

Explanation:

To determine which statement shows structure - function relationship, we analyze each option:

• "Dogs can be taught to fetch" is about behavior training, not structure - function.
• "A tiger’s diet is composed of meat" is about diet, not structure - function.
• "Some species of birds live longer than others" is about lifespan variation, not structure - function.
• "Porcupines have quills to protect themselves from predators" shows that the structure (quills) has a function (protection from predators), which is a clear structure - function relationship.

Answer:

Porcupines have quills to protect themselves from predators