During the period, jawless fishes were the first vertebrates to leave fossil evidence.

Amistake occurs during mitosis of a muscle stem cell.how might this affect muscle tissue

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis