Jeffrey wants to lose weight by using caffeine to help with exercise. He asks himself, “Will caffeine raise the heart rate to help burn more fat?” He tries to test this out by comparing the heart rates of his neighbors, 3 brothers who are triplets. One of the brothers drinks Pepsi, another drinks a double shot of espresso (which is coffee with twice the normal amount of caffeine) and a third brother drinks only water for comparison. Jeffrey finds out that the triplet with the double shot of espresso had the highest heart rate.
55. What is the independent variable for this experiment?

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

the answer is c.mitochondria. glad to .

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.