Some cattle were given bovine growth hormone (bgh) to see if they would produce more meat. the animals were studied over a period of two years. animals in group a were injected with bgh. what was the independent variable in the experiment?
(explain how you got that letter choice)
a. the amount of bgh that each group received
b. the amount of meat produced
c. the size of the cow
d. the time the cows were observed.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.