Any individual organism will age and eventually die.

Any individual organism will age and even- tually die.

But the organism dies easily and can be hard to culture, so a negative result does not rule out pertussis.

When the organisms die, their shells are deposited as sediment and eventually turn into limestone.

When these organisms die, their shells sink and accumulate on the ocean floor.

During winter, when organisms die, carbon is deposited down, resulting to a black layer.

Thus soon after this limit is reached the organism dies.

When an organism dies and decays, this water is taken up by plants again.

Biostratinomy is the study of the processes that take place after an organism dies but before its final burial.

But all those organisms had in fact died immediately upon exposure, or shortly thereafter.