That is a chemical change or reaction.
Invasive firestorm method. All pests are now dead with the added benefit of fewer trees to infest.
Your answer is D, Rhizobium
Answer: The answer is D; The speed of neural transmission is measurable
Explanation:
Helmholtz constructed an apparatus specially to measure short time intervals of the order of ten-thousandths of a second, Helmholtz was able, in an elegant experiment published in 1850, to measure precisely the speed of conduction of the nerve signals in the motor nerve of the frog's leg.