The substances which reduce friction are called _________.
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If the speed of an object moving along a straight line keeps changing, its motion is said to be _________.
In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called ____________.
Order Primata comprising monkey, gorilla and gibbon is placed in class Mammalia along with order Carnivora that includes?
The oceanic crust mainly consists of silica and __________.
In due course of time the meander loop cuts off from the river and forms a cut-off lake, also called an _________ lake.
The Chola kingdom mostly ruled which region of India?
During their rule the British persuaded or forced cultivators in Assam to grow __________.