In a marine food web, the total biomass of algae far outweighs the total biomass of all the killer whales. Why?

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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gag reflex, poor dentition, gum retraction

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i think the answer is a.keratin is the pigment responsible for skin color.