Thursday, 29 December 2011

www.UPSCPORTAL.com : "Today's Important News: 29 December 2011" plus 6 more

www.UPSCPORTAL.com : "Today's Important News: 29 December 2011" plus 6 more

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Today's Important News: 29 December 2011

Posted: 29 Dec 2011 03:15 AM PST

(IGP) IAS Pre Paper - 2: GS - Basic Numeracy - Unitary Method (MCQ -4)

Posted: 29 Dec 2011 12:31 AM PST


Basic Nmeracy
Unitary Method (MCQ -4)

1. Cost of 24 pens is Rs 96. Find the cost of 16 such pens.
(a) Rs 66
(b) Rs 64
(c) Rs 62
(d) Rs 68


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(IGP) IAS Pre Paper - 2: GS - Basic Numeracy - Unitary Method

Posted: 29 Dec 2011 12:16 AM PST


Basic Nmeracy
Unitary Method

Unitary method is the basic area of arithmetic. In the CSAT paper this portion of Basic numeracy will help you to solve myriad problems.

Direct Proportion

Two quantities are said to be directly proportional, if on the increase in one the other increases proportionally or on the decrease in one the other decreases proportionally.
eg, More the numbers of articles, More is the cost.
More the number of workers, More is the work done.
Less the number of articles, Less is the cost.
Less the number of workers, Less is the work done.

Indirect Proportion

Two quantities are said to be indirectly proportional, if on the increase in one the other decreases proportionally or on the decrease in one the other increases proportionally.


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(IGP) IAS Pre: GS - Science & Technology : Biology - The Circulatory System (MCQ -8)

Posted: 28 Dec 2011 11:19 PM PST


Biology
The Circulatory System (MCQ -8)

1. Consider the following statements.
(i) Vertebrates and a few invertebrates have a closed circulatory system.
(ii) Close circulatory systems have blood closed at all times within vessels.
(iii) Human circulatory system is called the cardiovascular system.

Which of the above are correct?
a) i & ii
b) ii&iii
c) iii only
d) All of the above


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(IGP) IAS Pre: GS - Science & Technology : Biology - The Circulatory System

Posted: 28 Dec 2011 11:13 PM PST


Biology
The Circulatory System

INTRODUCTION

Living things must be capable of transporting nutrients, wastes and gases to and from cells. Single-celled organisms use their cell surface as a point of exchange with the outside environment. Multicellular organisms have developed transport and circulatory systems to deliver oxygen and food to cells and remove carbon dioxide and metabolic wastes.

CIRCULATORY SYSTEMS IN SINGLE CELLED ORGANISMS

Single-celled organisms use their cell surface as a point of exchange with the outside environment. Sponges are the simplest animals, yet even they have a transport system. Seawater is the medium of transport and is propelled in and out of the sponge by ciliary action. Simple animals, such as the hydra and planaria lack specialized organs such as hearts and blood vessels, instead using their skin as an exchange point for materials. This, however, limits the size an animal can attain. To become larger, they need specialized organs and organ systems.

CIRCULATORY SYSTEMS IN MULTICELLULAR ORGANISMS

Multicellular animals do not have most of their cells in contact with the external environment and so have developed circulatory systems to transport nutrients, oxygen, carbon dioxide andmetabolicwastes.Components of the circulatory system include

i. Blood: a connective tissue of liquid plasma and cells
ii. Heart: a muscular pump to move the blood
iii. Blood vessels: arteries, capillaries and veins that deliver blood to all tissues

TYPES OF CIRCULATORY SYSTEMS

(a) The open circulatory system The open circulatory system, examples molluscs and arthropods. Open circulatory systems (evolved in insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. The resulting blood flow is sluggish.


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(IGP) IAS Pre: GS - Geography - World Geography General: Antarctica (MCQ -8)

Posted: 28 Dec 2011 10:14 PM PST


World Geography General
Antarctica (MCQ -8)

1. Which of the following are correct?
a) Antarctica is the fifth largest continent
b) It is roughly circular in shape
c) It is called the White Continent

a) i and ii
b) ii and iii
c) all of the above
d) i i


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(IGP) IAS Pre: GS - Geography - World Geography General: Antarctica

Posted: 28 Dec 2011 09:57 PM PST


World Geography General
Antarctica

Area : 1,40,00,000 sq. km

Population : Uninhabited

Size : Fifth largest continent.

Situation : Antartica, centred on the South Pole, is situated 960 km from South America, 2,700 km from Australia and 4,000 km from South Africa. It is surrounded by Southern or Antarctic Ocea, formed the southern waters of Pacific, Indian and Atlantic Ocean.


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