1) Which statement best explains the factors that influence the bird’s feather color? a) The bird’s feather color is inherited from its parents. b) The bird's feather color changes in response to its parents’ traits. c) The bird’s feather color changes in response to its environment. d) The bird’s feather color is unpredictable and changes at random. 2) A student has a dog who gives birth to puppies. The dog and the puppies are shown. Which statement best explains the variation in the puppies’ fur colors? a) All puppies have the same fur color because they have the same parents. b) The puppies have different fur colors because they eat different types of food. c) The puppies’ fur colors vary because they inherited traits from their parents. d) The puppies’ fur colors depend on how much time they spend outside. 3) Caribou live in snowy habitats. Baby caribou are born with white spots on their fur. Adult caribou do not have white spots. What advantage could the white spots give the baby caribou? a) The white spots help the baby caribou run faster. b) The white spots help the baby caribou hide from predators. c) The white spots help the baby caribou take care of other young caribou. d) The white spots help the baby caribou find food more easily. 4) Look at the image of four puppies. The puppies have the same parents and are the same age. They are all different sizes. Which statement best explains what factors influence the puppies’ sizes? a) Their sizes come only from the genes they inherit from their parents. b) Their sizes come only from how much they play. c) Their sizes are not affected by their genes or what they eat. d) Their sizes come from both the traits they inherit and their environment. 5) The two whooping cranes are siblings. They have similar long necks, but their beaks are slightly different shapes. Which statement best explains these observations? a) Siblings can have variation in traits, such as beak shape. b) The shape of a crane’s beak is determined only by its environment. c) The crane with the curved beak is older, and its beak shape changed over time. d) The two cranes are different species, which explains the difference in their beak shapes.

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