Class 12th Biology 2013 Set3 Delhi Board Paper Solution
Question 4
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
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- Q:- What is vegetative propagation? Give two suitable examples.
- Q:- Do you think microbes can also be used as source of energy? If yes, how?
- Q:- Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?
- Q:- Differentiate between a zoospore and a zygote.
- Q:- Name important defence mechanisms in plants against herbivory.
- Q:- Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?
- Q:- Compare and contrast the advantages and disadvantages of production of genetically modified crops.
- Q:- Name any two species of fungus, which are used in the production of the antibiotics.