| (IGP) IAS Pre Paper - 2: GS - Basic Numeracy - HCF & LCM (MCQ -3) Posted: 22 Dec 2011 01:49 AM PST |
| (IGP) IAS Pre Paper - 2: GS - Basic Numeracy - HCF & LCM Posted: 22 Dec 2011 12:29 AM PST 
Basic Numeracy
HCF & LCM Highest Common Factor The highest common factor of two or more given numbers is the largest of their common factors. It is known as GCD also. eg, Factors of 20 are 1, 2, 4, 5, 10, 20
Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36
Here greatest and common factor of 20 and 36 is 4.
HCF of 20 and 36 is 4. read more © 2011 www.upscportal.com INTEGRATED Guidance Programme for IAS 2012(CSAT)  :: CSAT Sample Papers :: Current Affairs | CSAT Syllabus | UPSC MAINS PAPERS Get Your Dream Job. SUBMIT YOUR RESUME Online. |
| (IGP) IAS Pre: GS - Science & Technology : Biology - Lymphatic System and Immunity (MCQ -6) Posted: 21 Dec 2011 11:58 PM PST |
| (IGP) IAS Pre: GS - Science & Technology : Biology - Lymphatic System and Immunity Posted: 21 Dec 2011 11:51 PM PST 
Biology
Lymphatic System and Immunity THE LYMPHATIC SYSTEM -
The lymphatic system is composed of lymph vessels, lymph nodes, and organs. The functions of this system include the absorbtion of excess fluid and its return to the blood stream, absorption of fat (in the villi of the small intestine) and the immune system function. -
Lymph vessels are closely associated with the circulatory system vessels. Larger lymph vessels are similar to veins. Lymph capillaries are scatted throughout the body. Contraction of skeletal muscle causes movement of the lymph fluid through valves. - Lymph organs include the bone marrow, lymph nodes, spleen, and thymus.
- Bone marrow contains tissue that produces lymphocytes. B-lymphocytes (B-cells) mature in the bone marrow.
- T-lymphocytes (T-cells) mature in the thymus gland.
- Other blood cells such as monocytes and leukocytes are produced in the bone marrow.
- Lymph nodes are areas of concentrated lymphocytes and macrophages along the lymphatic veins.
- The spleen is similar to the lymph node except that it is larger and filled with blood.
- The spleen serves as a reservoir for blood, and filters or purifies the blood and lymph fluid that flows through it.
 - If the spleen is damaged or removed, the individual is more susceptible to infections.
- The thymus secretes a hormone, thymosin, that causes pre-T-cells to mature (in the thymus) into T-cells.
IMMUNITY read more © 2011 www.upscportal.comINTEGRATED Guidance Programme for IAS 2012(CSAT):: CSAT Sample Papers :: Current Affairs | CSAT Syllabus | UPSC MAINS PAPERS Get Your Dream Job. SUBMIT YOUR RESUME Online. |
| (IGP) IAS Pre: GS - Geography - World Geography General: Australia (MCQ -6) Posted: 21 Dec 2011 11:07 PM PST |
| (IGP) IAS Pre: GS - Geography - World Geography General: Australia Posted: 21 Dec 2011 10:50 PM PST 
World Geography General
Australia Introduction Latitude : 28015'N 54030'S Longitude : 112009'E 109012'W Area: 76,86,850 sq. km Population : 18.7 million Capital : Canberra Situation : Australia, the only ontinent that is also a country. It liest between the Indian and Pacific Oceans. It is surrounded by Timor Sea in the northwest, Arafura Sea dn Gulf of Carpentaria in the north, Great Barrier Reef in the northeast and Great Australian Bright in the south. To the south east of mainland lies the mountainous island of Tasmania. |
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