Class 12th Biology 2017 Set1 Delhi Board Paper Solution
Question 12
Draw a labelled diagram of the sectional view of a human seminiferous tubule (six parts to be labelled).
Answer
Fig: Sectional view of a human seminiferous tubule
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:- What are the major functions of male accessory ducts and glands?
- Q:- Which one of the following has the largest population in a food chain?
(a) Producers
(b) Primary consumers
(c) Secondary consumers
(d) Decomposers - Q:- Most living organisms cannot survive at temperature above 45°C°. How are some microbes able to live in habitats with temperatures exceeding 100°C?
- Q:- Differentiate between the following −
(a) Dominance and Recessive
(b) Homozygous and Heterozygous
(c) Monohybrid and Dihybrid. - Q:- Discuss with your teacher what does a suitable gene means, in the context of DNA vaccines.
- Q:- What is parturition? Which hormones are involved in induction of parturition?
- Q:- Briefly mention the contribution of T.H. Morgan in genetics.
- Q:- Can you recall meiosis and indicate at what stage a recombinant DNA is made?
- Q:- What are the major components of seminal plasma?
- Q:- Name important defence mechanisms in plants against herbivory.