The food and water that we drink everyday is pushed through by the esophagus.
Non-fluorescent calcein AM is hydrolyzed by intracellular esterases into the green fluorescent dye calcein, which can be used to quantify the number of viable cells.
https://www.creative-bioarray.com/support/calcein-am-cell-viability-assay.htm
The correct answer would be D
Cyanobacteria became the first microbes to to produce Oxygen (O2) as a product of Photosynthesis.
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In this laboratory you will be learning how to use one of the most important tools in biology –
the compound light microscope – to view a variety of specimens. You will also use a slightly
different type of light microscope called a stereoscopic dissecting microscope
