Why is cigaratte smoking injurious to health ? Name the enzyme which is present in infants but may be absent in adults.​

Explanation:

cigaratte smoking is injurious to health because it affects our lungs,heart and different internal organs of our body which is cause of cancer and other non curable diseases.

During smoking the cigarettes fumes make the walls alveoli very thin which causes rupturing of alveoli. This reduces the surface area for gaseous exchange in lungs .

To make up for the reduces gaseous exchange the heart has to pump more blood.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

a plastic spoon that has a temperature of 78° f is placed into a bowl of soup that has a temperature of 84° f. which of these correctly describes what will happen?

energy as heat moves from the soup to the spoon.