cds- Question :

Which one of the following animals has a three-chambered heart?

A :

Scoliodon

B :

Salamander

C :

Pigeon

D :

Human being
 

Answer : B

cds- Question :

Animals which are marine, bilaterally symmetrical, have a coelom and a notochord,but never form a vertebral column are placed under which one of the following groups ?

A :

Chordata

B :

Protochordata

C :

Vertebrata

D :

Mammalia

Answer : A

cds- Question :

Which one of the following is an example of vestigial organ in man?
 

A :

Jaw apparatus


 

B :

Ear muscles

C :

Canine teeth

D :

Humerus

Answer : B

cds- Question :

Which one of the following is a free-living bacterium that helps in nitrogen fixation in soil?
 

A :

Azotobacter
 

B :

Azolla

C :

Nostoc

D :

Anabaena

Answer : A

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