Or, for a medical example, suppose smoking multiplies the risk of lung cancer by some number R: then the Wald test can be used to test whether R = 1 (i.e. there is no effect of smoking) or is greater (or less) than 1 (i.e. smoking alters risk).
There are more than 900 species of Tardigrade or Water Bear, pictured. They're found everywhere in the world, from the highest mountains to the deepest oceans. Boil the 1mm creatures, freeze them, dry them, expose them to radiation and they're so resilient they'll still be alive 200 years later.
It can also be found in the grassland biome. Finally polar bears live in the tundra region. They are big, fluffy, white bears that can grow 7 - 8 feet tall. They prey upon large and small mammals, fish, birds, berries and leaves. Polar bears are found in the coasts, tundra, living on shore line and ice floats.