State two factors that determine choice of a microscope during biological investigations

An optical microscope is often one of the central devices in a life-science research lab. It can be used for various applications which shed light on many scientific questions. Thereby the configuration and features of the

One of the first things to consider when selecting a research microscope is the type of specimen you want to explore. For fixed samples mounted on a thin glass slide, you can use an upright microscope. Living cells demand special characteristics of the microscope because they are kept in relatively large cell culture vessels filled with cell culture media.

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desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.