Some samples are transparent, or very difficult to see, therefore, they are stained in order to be seen more clearly and easier to work with.
During eye surgery, the clear layer of the eye is stained to be easily extracted, if it was clear then the surgeon might cut the eye instead of just the layer.
Hope this helps, u might want to search online for more info.
Sediment . The trees was blocking the view so its organic
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Similarly, enzymes can only function in a certain pH range (acidic/alkaline). Their preference depends on where they are found in the body. For instance, enzymes in the intestines work best at 7.5 pH, whereas enzymes in the stomach work best at pH 2 because the stomach is much more acidic.
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I think the correct answer is D
Hey You!
I believe the correct answer to your question is: Endangered Species. (Also called threatened species).
I Really Hope This Helped You, Good Luck With Your Studies! =)
