The tubes 1, 5 and 6 is the answer to the question which test tubes were used to determine the optimal ph lipase activity. Lipase is an enzyme and optimum ph the maximum possible point on which enzyme become active.
Answer:
1
only 4 is the significant figure
we take tailing zeroes as significant figures only in case of decimals
(B.Hallow bones because bones are inside the body
Nona= 9, hepta= 7, hexa= 6, tetra= 4
