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Answer: It indicates the direction of the reaction
I hope this helped!
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Answer:A concave mirror is a spherical mirror with the surface of reflection is curved in an inward direction while a convex mirror is a spherical mirror with a reflecting surface with an outward bulge.
Explanation:
Hope this helps :D
Answer:
I think I it is selective breeding also known as artificial selection
primary division of the sea, which includes the whole mass of water subdivided into neritic and oceanic zones; also pertaining to the open sea (open water)