A)
what is the reason for repeating the procedure with distilled
water instead of hydrogen peroxide?
(1 mark)
b)
what is the reason for repeating the procedure with distilled
water instead of liver extract?
(1 mark)

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.

The changes that the students observed, rapid breathing and sweating, would be classified as a to a change in a system.