Why does your breathing rate increase when you exercise?

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

Did you know that a blue wales tongue weighs more than an elephant?

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content