1. Which statement best describes an organism's traits?
- A. The needs an organism has, like food and water.
- B. The other living things in an organism's environment.
- C. Its body parts and behaviors that help it meet its needs.
- D. The non-living parts of an environment, like rocks and soil.
2. A polar bear lives in the snowy Arctic. Which trait is most important for helping it stay warm?
- A. Sharp claws
- B. A thick coat of fur
- C. A strong sense of smell
- D. The ability to swim long distances
3. Why are an organism's traits, such as its body parts and behaviors, so important?
- A. They help it meet its basic needs for survival.
- B. They determine the exact number of offspring it will have.
- C. They change every day depending on the weather.
- D. They allow it to choose a brand new environment to live in.
4. A giraffe has a very long neck. This trait is most helpful for which of these survival needs?
- A. Hiding from predators in short bushes.
- B. Reaching leaves on tall trees for food.
- C. Digging for water under the ground.
- D. Running faster than other animals to escape danger.
5. A turtle can pull its head and legs into its hard shell. What is the primary survival need met by this trait?
- A. Finding a mate
- B. Protection from predators
- C. Keeping warm in cold water
- D. Catching food more easily
6. In biology, what does the "structure" of a trait, such as an animal's beak or claws, refer to?
- A. The job the trait helps the animal do to survive
- B. The environment where the animal finds its food
- C. The age of the animal when the trait appears
- D. The physical shape, size, and form of the trait
7. A polar bear has a thick coat of fur. What is the primary 'function' of this trait?
- A. To keep the bear warm in a cold environment
- B. To help the bear swim faster in the ocean
- C. To make the bear look bigger to scare away other animals
- D. To assist the bear in digging dens in the snow
8. Which statement best describes the relationship between the structure and function of a trait?
- A. The function of a trait determines its physical shape.
- B. A trait's structure and function are unrelated.
- C. The structure, or shape, of a trait determines its function, or job.
- D. Only the environment determines a trait's function, not its structure.
9. A duck has webbed feet, which is a specific structure. What function are these feet best suited for?
- A. Digging for worms on land
- B. Paddling efficiently through water
- C. Grasping onto tree branches
- D. Running quickly across open fields
10. A giraffe has a very long neck. Based on the principle of structure and function, what is the most likely purpose of this trait?
- A. To help it hear predators from far away
- B. To allow it to run faster than other animals
- C. To help it dig for water underground
- D. To enable it to reach leaves on tall trees for food