Class 12th Biology 2016 Set1 Outside Delhi Board Paper Solution
A large number of married couples the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being childless.
(a) Why in your opinion the female partner is often blamed for such situations in India ? Mention any two values that you as a biology student can promote to check this social evil.
(b) State any two reasons responsible for the cause of infertility.
(c) Suggest a technique that can help the couple to have a child where the problem is with male
(a) This is because of male dominated nature of our society. other reasons may be lack of moral value and education.
Being a biology student below are the values that i'll promote:
(1) We must provide proper biological/Sex education at such , a basic stand which can be clear to every individual.
(2) General Health awareness programme must be scheduled to persons for their health related queries.
(b)
(1) Ovulation disorders
(2) Problems in the uterus or fallopian tubes Causes of Infertility in Males :
(i) Low sperm count/Low sperm mobility
(ii) Genetic abnormality
(c) Artificial Insemination (AI) is a technique that can help the couple to have a child where the problem is with male partner. In this technique, the semen collected either from the husband or a healthy donor is artifically introduced into the vagina or into the uterus of the female.
ICSI (Intra Cytoplamsic Sperm Injection) is another specialized procedure to form an embryo in the lab in which a sperm is directly injected into the ovum.
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:- Discuss briefly the following:
(a) Radioactive wastes
(b) Defunct ships and e-wastes
(c) Municipal solid wastes - Q:- Write two major functions each of testis and ovary.
- Q:- What is the percentage of photosynthetically active radiation (PAR), in the incident solar radiation.
(a) 100%
(b) 50 %
(c) 1-5%
(d) 2-10% - Q:- Is the use of contraceptives justified? Give reasons.
- Q:- Discuss with your teacher what does a suitable gene means, in the context of DNA vaccines.
- Q:- Give examples to prove that microbes release gases during metabolism.
- Q:- Distinguish between
(a) Grazing food chain and detritus food chain
(b) Production and decomposition
(c) Upright and inverted pyramid
(d) Food chain and Food web
(e) Litter and detritus
(f) Primary and secondary productivity - Q:- Draw a labeled diagram of a section through ovary.
- Q:-
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above - Q:- Define decomposition and describe the processes and products of decomposition.