World Geography
The major geological events of the Palaeozoic era include

None of these
both (a) and (b)
Caledonian mountain rise, life comes ashore
Appalachians and Central European mountains come up

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World Geography
The periodic rise and fall of the sea level on the earth, gives rise to tides. This is related to

None of these
ultraviolet rays from the sun
the position of the moon with reference to the earth and the gravitational pull exerted mainly by the moon and partly by the sun
infrared rays from the sun

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