Explain why global climate models typically work by treating the planet as a set of connected boxes or grid cells?

Which are forms of nitrogen that are usable by humans

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.