Why does passive immunity for a new-born only lasts for a short time?

The recipient will only temporarily benefit from passive immunity for as long as the antibodies persist in their circulation. This type of immunity is short acting, and is typically seen in cases where a patient needs immediate protection from a foreign body and cannot form antibodies quickly enough independently.

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FALSE

Pangea forms to de end of the Paleozoic where all the emerged lands fusion together on a C shape surrounding Ecuador line.

The breaking occurs between the Triassic and the Jurassic era because of the movement of the tectonic plates.

At first, it creates two big continents divided by a sea, and with time it's brakes to form the continents we know today.