Question
Why are adolescents especially advised not to smoke? How does smoking affect the functioning of the body?
✓
Answer
Adolescents are advised not to smoke for the following reasons:
- Smoking paves way for hard drugs.
- Smoking is associated with increased incidences of cancers of lung, throat and bronchitis and emphysema, smoking also increases carbon monoxide content in blood and reduces the concentration of haem-bound oxygen.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What are decomposers? What is their function in ecosystem?
Study the given pedigree chart and answer the questions that follow.
- Is the trait recessive or dominant?
- Is the trait sex linked or autosomal?
- Give the genotypes of the parents shown in generation I and their III child shown in generation II and the first grandchild shown in generation III.
How isolation of DNA is done from the cell?###Explain: separation and isolation of the genetic material (DNA).
Name the type of curve that characterizes most populations growing in favourable environment. Define carrying capacity.
The diagram shows the female reproductive system. Where do fertilisation and implantation occur?
A person is born with a hereditary disease with a weakened immune system due to deficiency of an enzyme. Suggest a technique for complete cure for this disease, identify the deficient enzyme and explain the technique used for cure.
The following graph shows the species-area relationship. Answer the following question as directed.
- Name the naturalist who studied the kind of relationship shown in the graph. Write the observation made by him.
- Write the situations as discovered by the ecologists when the value of 'Z' (slope of the line) lies.
- 0.1 and 0.2
- 0.6 and 1.2
What does 'Z' stand for?
- When would the slope of the line 'b' become steeper?
Name the pioneer species on a bare rock. How do they help in establishing the next type of vegetation? Mention the type of climax community that will ultimately get established.
What are chorionic villi?
- Which insects are killed by Bacillus thuringiensis?
- The Bt binds to which cells?
- In which plants Bt toxin is used?