The polarity of water allows it to dissociate ionic and other polar compounds, thus allowing many important chemical reactions to occur. Those reactions are called aqueous reactions. Most of the reactions that sustain life are aqueous with water acting as the "universal solvent".
Answer: Endotherms have the highest growth rates and ectotherms the lowest
Answer: 1 phylum ,genus ,class ,species
It is a sphere to be precise.
Because of the omnidirectional nature of the gravitational attraction, mass tends to form spheres in the macro scale of planets and similarly massive celestial bodies.