Final answer:
It is false that there's no way to prevent a specimen from drying out after placing a coverslip; sealing the edges or using fixation methods can preserve the sample.
Step-by-step explanation:
The statement that 'there is no way to prevent your specimen from drying out once you've placed the coverslip over your sample' is false. There are ways to prevent specimens from drying out, such as sealing the edges of the coverslip with clear nail polish or another type of sealant to prevent evaporation. This technique is particularly useful in preserving wet mounts. Furthermore, for longer-term studies, specimens can be fixed using chemical or heat fixation methods which attach cells to the slide and prevent them from drying out.