On How to Arrange Infinitely many Marriages!

Given infinitely many girls (!), every r of whom are acquainted with a finite number > r of boys for every r, can each girl get married to one of her acquaintances?

Address for Correspondence
B Sury
Statistics and Mathematics Unit
Indian Statistical Institute
Bangalore 560 059, India.

Project Lifescape

9. Crows

Project Lifescape aims to generate attractive material on a set of about 1500 species and higher taxonomic categories of specially identified taxa to nurture the study of living organisms as a part of teaching biology and other related subjects in India. With their bright colours, mellifluous calls and sizes ranging from that of our thumb like the flower pecker, to full human height like the saras crane, birds have always fascinated people who have longed to take to air after them. They have been conferred the status of vehicles of Gods, and thereby protected, as peafowl is around Murugan temples. But they are also extensively hunted for flesh and feathers and caged for entertainment. With so much attention focussed on them, they are the most studied group of animals, with thousands of bird watchers in every part of the world.

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Address for Correspondence
Madhav Gadgil
Centre for
Ecological Sciences
Indian Institute of Science
Bangalore 560 012, India.
Email: madhav@ces.iisc.ernet.in

Transgenics in Agriculture

Biotechnology has opened unprecedented avenues for exploring biological systems. One of the key techniques in genetic engineering is gene transfer, which involves transfer of recombinant DNA into plant cells to generate transgenic plants. Genes and genomes from a wide range of organisms are being manipulated for the benefit of mankind. Application of genetic engineering in agriculture has produced significant achievements such as yield improvement of major food crops

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Address for Correspondence
D Rex Arunraj
B Gajendra Babu 
Tamil Nadu Agricultural University
Coimbatore 3, India.