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Bio-Diversity and its Conservation

7. 

Which of the following is the correct sequence for the life cycle of Aurelia, a true jelly fish?

A. Medusa -> Planula -> Polyp -> Scyphistoma -> Ephyra B. Medusa -> Ephyra -> Planula -> Polyp -> Scyphistoma C. Medusa -> Planula -> Scyphistoma -> Polyp -> Ephyra D. Medusa -> Planula -> Ephyra -> Polyp -> Scyphistoma

Answer : C. Medusa -> Planula -> Scyphistoma -> Polyp -> Ephyra

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8. 

Plasmodium belongs to this group

A. Protozoa B. Virus C. Bacteria D. Fungus

Answer : A. Protozoa

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9. 

Dynosaur eggs have been found recently in

A. Madhya Pradesh B. Maharashtra C. Gujarat D. Tamil Nadu

Answer : C. Gujarat

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10. 

Consider the following statements:
I. Sericulture means cultivation of silkworm
II. Arboriculture means the cultivation of trees and vegetables
Of these statements:

A. I and II are true B. I and II are false C. I alone is correct D. II alone is correct

Answer : A. I and II are true

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11. 

Which one of the following provides the best estimate of the world's biological diversity?

A. of about ten million species probably alive today, some 20 species are lost everyday, most of them unknown because no more than half a million have yet been actuallly identified by scientists B. of about thirty million living species, some 50 are lost everyday, most of them unknown because no more than one million have been actually identified C. of about forty five million living species, some 100 are lost everyday, most of them unknown because no more than 1.5 million have been actually identified D. of about seventy five million living species, some 500 are lost everyday, most of them unknown because no more than 3 million have been actually identified

Answer : C. of about forty five million living species, some 100 are lost everyday, most of them unknown because no more than 1.5 million have been actually identified

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12. 

The most valuable pearl is produced by

A. Mytilus B. Unionidae C. Meleagrina D. Ostrea virginiana

Answer : B. Unionidae

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