Read each example and decide what the resulting effect on the gene pool of that population would be. _ A zebra migrates to join a different herd of zebras.

_Competition for sunlight leads to taller trees.

_The DNA of a snake changes to make its venom stronger.

_A grassfire randomly sweeps through a population of buffalo and kills most of the animals.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

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.

allowed for the prediction of the properties of missing elements.

yes we can.   a lady urinates from her urethra.