Answer:A
Explanation:becuse they waste less heat energy
Answer:
option b is the correct answer
One kilogram is equal to one thousand grams. Further, one gram is equal to 1000 mg. The conversion is as shown below,
(6.285 x 10³ mg) x (1 g / 1000 mg) x (1 kg / 1000 g)
The numerical value of the operation above is 0.006285 kg.
B. He was the first person to observe and identify living cells.
