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Q.

Which of the following is a correct statement ?

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a

The maximum life span of a dog is 45 years.

b

Gemmules are external buds in sponges.

c

All bony fishes are viviparous

d

External syngamy is seen in frogs.

answer is D.

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Detailed Solution

Frog shows external fertilization , life span of dog is 10 to 13 yrs , bony  fishes are oviparous and gemmules are internal  buds in sponges

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