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41.

Non-chordates of all phyla flourished during the period:

A.	Cambrian	B.	Devonian
C.	Ordovician	D.	Triassic

42.

Sponges originated in Proterozoic Era which is associated with:

A.	"Appalanchian Revolution"	B.	"Rocky Mountain Revolution"
C.	"Second Great Revolution"	D.	"First Great Revolution"

43.

Which of the following eras is 'Era of Invisible Life":

A.	Azoic	B.	Archaeozoic
C.	Proterozoic	D.	Palaeozoic

44.

Prokaryotes and Eukaryotes originated and diversified in primitive ocean during:

A.	"Appalanchian Revolution"	B.	"Recky Mountain Revolution"
C.	"First Great Revolution"	D.	None of these

45.

Diversification of brachiopods, copepods, primitive echinoderms and arachnids occurred in:

A.	Cambrian period	B.	Tertiary period
C.	Triassic period	D.	None of these

46.

Brachiopods and Copepods dominated in:

A.	Cambrian period	B.	Ordovician period
C.	Permian	D.	None of these periods

47.

Large and winged insects originated about 34.5 erore years ago during the period known as:

A.	Permian	B.	Carboniferous
C.	Triassic	D.	Devonian

48.

In which of the following Epochs apes originated from monkeys:

A.	Holocene	B.	Oligocene
C.	Miocene	D.	Pliocene

49.

In which of the following periods the crocodiles, alligators and advanced lizards originated:

A.	Triassic	B.	Cretaceous
C.	Carboniferous	D.	Jurassic

50.

New mountain ranges (Cascade, Sierra etc.) formed upon American continent and new volcnic ranges appeared in North-West American during the period:

A.	Quarternary	B.	Tertiary
C.	Creataceous	D.	None of these