They are both ectothermic, but fish have gills, and reptiles have lungs.
Mountains provide for the freshwater needs of more than half of humanity, and are, in effect, the water towers of the world. The world's mountains encompass some of the most spectacular landscapes, a great diversity of species and habitat types, and distinctive human communities.
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The answer is C. Th genotypic ratio is 50% Mm 50% mm. Th phenotypic ratio is 50% marbled 50% solid
That is called MUTUALISM, when both organisms benefit each other.
