nitrogen comes from an air that is called fractional distillation.
The three groups of amphibians: Salamanders, Frogs, and Caecilians are different because they look different as adults. Salamanders have tails and they have four weak short limbs that allow them to walk instead of jump. Frogs have fours legs with strong hind legs and no tails. Caecilians have no legs and they are burrowing animals.
B. Clade 1 is ancestral to all the other clades
<em>His red blood cell count is low.</em>
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<em>— hope this helps—</em>
