Biogeography- it is the geographic location and distribution of living
organisms.
It provide evolution in many ways because organisms are not
distributed evenly throughout the world, but related organisms are found in the
same isolated parts of the world and this is not explained by
climate.
The phylum Echinodermata , which contains about 6000 species, gets its name from the Greek, literally meaning "spiny skin." Many echinoderms actually do have "spiny" skin, but others do not. This phylum exists exclusively in the sea, and cannot be found on land or in fresh water.
Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time there are 20 amino acids.
