Human Reproduction — BIOLOGY STD 12 Science — Question

Ankit attended a blood donation camp to donate blood and came to know that he was HIV positive. He lost interest in studies knowing that. He remained absent from school for a long time. The biology teacher visited his house and talked to him. Ankit started coming to school again and showed interest in studies.

1. A person detected to be HIV positive should be isolated by the society. Do you agree? Why/ why not?
2. Write the processes through which, AIDS does not spread.
3. Who are at higher risk of encountering AIDS?
4. What sense of responsibility did the biology teacher exhibit?

Some microbes act as very good biofertilisers. Explain with the help of three suitable examples.

Recently a girl baby has been reported to suffer from haemophilia. How is it possible? Explain with the help of a cross.

Expand the following and explain any one of them:

1. IVF
2. ZIFT
3. MTP

Choose any three microbes, from the following which are suited for organic farming which is in great demand these days for various reasons. Mention one application of each one chosen.
Mycorrhiza; Monascus; Anabaena; Rhizobium; Methanobacterium; Trichoderma.

Selecting the recombinants becomes cumbersome when antibiotic is inactive- explain.###How can we distinguish between recombinant and non recombinant plasmid? Illustrate.

Draw a labelled diagram of female reproductive system.

What are interferons. Explain its role in providing immunity. Also name the kind of immunity provided by it.

Your school has been selected by the Department of Education to organise and host an interschool seminar on "Reproductive Health - Problems and Practices". However, many parents are reluctant to permit their wards to attend it. Their argument is that the topic is "too embarrassing."
Put forth four arguments with appropriate reasons and explanation to justify the topic to be very essential and timely.

Describe the process of microsporogenesis.