1: give the common name of periplanata americana 2: how many spermathecae are found in earthworm

The most accurate answer is:
1). Cockroaches 

2). 4 pair of spermathecae are found in earthworm 

The common name of the periplaneta Americana is the American cockroach.

There are four pairs of spermathecae in earthworms. These pairs are found between the sixth and ninth segments of the earthworms, at the front of the body.

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