636: The trees of spruce, fir, pine, etc. are found in which of the following natural regions of the earth?
(a) Laurentian type
(b) Alpine type
(c) Taiga type
(d) Siberian type
637: Which one of the following is the landmark performance of Dr. V. Mohan Reddy, an Indian born doctor working in USA, during February, 2005?
(a) Successful brain surgery to revive the function of nearly dead brain of a premature born infant.
(b) Research on genetic engineering which can help in treatment of deadly disease like AIDS.
(c) Research on human stem cell which is likely to revolutionize treatment of deadly disease like cancer.
(d) Successful open heart procedure called arterial switch performed on an infant.
638: To uphold and protect the sovereignty, unity and integrity of India, a provision has been made in the:
(a) Directive Principles of State Policy
(b) Preamble to the Constitution
(c) Fundamental Duties
(d) Fundamental Rights
639: The brothers Umakant and Ramakant Gundecha are
(a) Kathak dancers
(b) Dhrupad vocalists
(c) Tabla players
(d) Sarod maestros
640: Which one of the following is a non-metallic mineral?
(a) Manganese
(b) Magnesium
(c) Gypsum
(d) Bauxite