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Hello students, today will be solving a question in biology.
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As you can see from the question, they've given us that.
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Why is metal in blue used to view epithelial cells? okay, so this question is asking us about metal in blue and why it is used to view.
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And the options they've given us are it stains them so they stand out against the background.
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It stains them to stand out against the background, which means to, differentiate against the background.
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The second option they've given us is the cells absorb methanol blue as a source of food.
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Okay.
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The second option is methanol blue is used as a source of food by the cells.
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The third option is methanol blue allows the spectra photometer to determine the absorbence reading.
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Okay.
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Third option as methalm blue allows spectrophotometer determine absorbance reading which is to determine the amount of light and color absorbed.
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Finally, option d they given us is the cells phagocytocize the blue stain.
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The cells phagocytocize the blue stain.
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Now from the immediate view of the question, we can eliminate option d.
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This is because phagocytosis is a process that's occurring with white blood cells.
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And this phagocytosis is a immunity process.
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It's an immunity process where when the leukocytes or the white blood cells, okay, when the leukocytes or the white blood cells comes in contact...