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What is a controlled experiment? This is when a hypothesis is scientifically tested. In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled.
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I'd say precipitation, it won't be alive though so biodiversity is wrong
C.
In co-dominance both traits show up, and in incomplete dominance the two traits mix together.
So automatically A, B and D are wrong, since we can see both brown and white colors on the cow separately.
If it were any of those we wouldn't be able to see any of the traits alone they would be a mix.
Cardiac Arrest is the official term for heart attack
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Cats also purr when they are nervous or in pain, leading some experts to believe that this uniquely feline vocalization is actually a method of self-healing. A domestic cat's purr has a frequency of between 25 and 150 Hertz, which happens to be the frequency at which muscles and bones best grow and repair themselves.
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