How do parasites cause diseases in humans?

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

Why does miranda have that particular vision of dr hildesheim answer?

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.