Can you please say this in english so i could help you !! i have no experience with this language my apologies
Adjustment knobs are used to focus light in a light microscope
It would be an antioxidant, and the most commonly used antioxidant would be absorbic acid.<span />
Answer:
The correct answer would be (b) All scientific theories are subject to change and improvement.
Explanation:
No theory is considered the absolute truth, although some have been proved and deeply studied, through years many theories that were considered completely true, have become incomplete or false. Therefore, as true and correct a theory sounds, it can still be proved wrong in the future.