___ is the structure of a living thing.
___ structures are found on the inside of living things.
___ structures are found on the outside of living things.
___ are behaviors or physical characteristics that help an organism to survive and reproduce in its environment.
A ___ is a community of plants and animals that have common characteristics for the environment in which they exist.
Leaves, bark, and flowers are ___ structures of plants.
The heart, brain, and stomach are ___ structures of animals.
Legs, claws, and wings are ___ structures of animals.
Heart, lungs, and brain are ___ structures of animals.
In the aquatic biome, fish have ___ for taking in oxygen and fins for movement.
Lily pads have wide ___ in order to take in sunlight.
Whales and sea lions have a layer of ___, or fat, under their skin to keep them warm.
Polar bears and arctic foxes have thick ___ to keep them warm.
Many desert animals are ___, meaning they sleep during the day and are active at night.
Giraffes have long ___ so they can reach a lot of food sources that other animals can't reach.
Some birds have long ___ to help them eat nectar from flowers.
Blending in with the environment is called ___.
Desert plants may have ___ to protect them from thirsty animals.
Some animals may ___, or move from one place to another, when their environment gets too cold or when food is hard to find.