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.
Most seals live in the arctics and survive in the harsh and bitter cold weather because they have a layer of thick fat called blubber. Seals and sea lions live most of the â¦ ir lives in the water but come out on land to bask in the sun. They come up during the breeding season. They like deep salt water because it provides plenty of fish to keep them alive and healthy. Seals live in places where disturbance is minimal.