Darwin calculated that, if a single breeding pair of elephants reproduced and all their offspring survived and reproduced, in 750 years there would be a standing population of 19 million elephants. in africa and asia, where elephants live in the wild, the total number of elephants is currently less than one million. explain this in terms of natural selection

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due