Topic: Food Energy and Respiration Subtopic: Diseases of the respiratory system
Which harmful chemical is black in color?
Answer: Tar is the chemical which has a blackish shade. It is one of the most harmful chemicals because it damages the respiratory more than any other chemical present in the cigarette.
- What is an inhaler?
- Why do not plants require huge amount of raw materials?
- Are varicose veins dangerous?
- What is active transport?
- Why is thrombosis dangerous?
- Why is blood important?