Answer:
relating to or determined by the origin, development, or causal antecedents of something
Explanation:
Answer:
natural selection is the answer
Answer:
Synthesis
Explanation:
A synthesis chemical reaction is where two simpler substances form together to create a more complex product.
The reactants can be either a single element or a compound, but the product is always a compound.
Since Mg and O2 reacted to create MgO, a compound, this represents a synthesis reaction.
Answer:
Selective breeding is when a human or farmer in this case selects two plants or chickens with the best traits in order to get a good yield and quality for the products they are producing. I hope this helps!
Answer:
photochemical smog
Explanation:
Thick, brownish haze formed when certain gases in the air react with sunlight is called photochemical smog.
Photochemical smog is a combination of pollutants which are formed when certain gases such as nitrogen oxides and other organic compounds react with sunlight, leading to the formation of brown haze.