four columns reception

It is a collection of nervous tissue running along the back bone. It is, in fact, protected by the vertebral column. It is a continuation of the brain. It consists of a central canal that has cerebrospinal fluid that is continuous with the fluid in the brain. The canal is surrounded ..

Summary - Periodic table is an arrangement of elements in the increasing order of atomic number such that elements with similar properties fall under same vertical column. A Group is a vertical column in the periodic table. A Period is a horizontal row of elements in the periodic tab..

A matrix is defined as a rectangular array of elements. If the arrangement has m rows and n columns, then the matrix is of order mxn (read as m by n). A matrix is enclosed by a pair of parameters such as ( ) or [ ]. It is denoted by a capital letter. Two matrices are said to be compa..

Summary - A matrix is defined as a rectangular array of elements. If the arrangement has m rows and n columns, then the matrix is of order mxn (read as m by n). A matrix is enclosed by a pair of parameters such as ( ) or [ ]. It is denoted by a capital letter. Two matrices are said to be ..

1. The modern periodic table is divided into two main categories: (i) Vertical columns called Groups and (ii) Horizontal columns called Periods. 2. There are 18 vertical columns or groups. These are further sub-divided into A and B (groups I to VII), VIII ..

With increasing complexity, the organisms have had to develop means of control and coordination between the different parts of the body. Coordination is necessary for acting as one unit and to maintain the homeostasis or steady state within the body. Control and coordination in animal..

The refining of petroleum is done in big refineries. Washing it with acidic or basic solution first neutralizes crude oil. A furnace is used to heat up the crude oil to 650 - 675 K and then the pressure reduced. The resulting crude oil vapors are fed into a fractionating column through a..

>Echinoderms are radially symmetrical in the adult stage and bilaterally symmetrical in the larval stages. Chordates are animals with a notochord, a dorsal tubular nerve cord and pharyngeal gill slits. Vertebrates represent a major group of chordates. Vertebrates are characterised by the presence o..

An extract from the Natural Sine tables is given below: Find from the tables the value of (i) sin 56 o (ii) sin 56 o 24 ' (iii) sin 56 o 28 ' . (i) sin 56 o Find 56 o on 'Natural Sines' tables in 'A' group. As there are no minutes, the value is read horizontally under the 0 ' column. sin ..

">When a kidney is damaged or diseased, the other kidney is able to compensate for it. So a person can lead a normal life with only one kidney. A normal adult excretes 1 - 1.8 litres of urine per day. An artificial kidney (dialysing machine) is used for dialysis. When the kidneys of a patient stop ..