The modern horse evolved from mules
Nitrogen Fixation: Root and Bacteria Interactions. Nitrogen is an important macronutrient because it is part of nucleic acids and proteins. ... The most important source of BNF is the symbiotic interaction between soil bacteria and legume plants, including many crops important to humans.
The answer: " temperate broadleaf forest and grassland" biomes .
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A chastity belt or not having sex at all
C however it is only a hypothesis that something of an extraterrestrial impact such asteroid or a comet or a massive bout of volcanism