Class 12th Biology 2013 Set2 Delhi Board Paper Solution
Question 7
Why sharing of injection needles between two individuals is not recommended?
Answer
Sharing of injection needles may lead to transmission of HIV-infection.
Popular Questions of Class 12th biology
- Q:- What is spermatogenesis? Briefly describe the process of spermatogenesis.
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals. - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
- Q:- What is DNA fingerprinting? Mention its application.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- Describe the structure of a seminiferous tubule.
- Q:- What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
- Q:- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- Q:- Explain the Law of Dominance using a monohybrid cross.
Recently Viewed Questions of Class 12th biology
- Q:- An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree?
- Q:- Name the methods employed in animal breeding. According to you which one of the methods is best? Why?
- Q:- Discuss the causes and effects of global warming. What measures need to be taken to control global warming?
- Q:- Draw a well-labelled diagram of an antibody molecule.
- Q:- What is meant by the term breed? What are the objectives of animal breeding?
- Q:- Name any five hybrid varieties of crop plants which have been developed in India.
- Q:- What initiatives were taken for reducing vehicular air pollution in Delhi? Has air quality improved in Delhi?
- Q:- Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.
- Q:- Column A Column B
(a) Catalytic converter (i) Particulate matter
(b) Electrostatic precipitator (ii) Carbon monoxide and nitrogen oxides
(c) Earmuffs (iii) High noise level
(d) Landfills (iv) Solid wastes - Q:- Discuss the role of fishery in enhancement of food production.