The physical expression of genes are phenotype. Phenotype is the expression of the gene by the appearnace of the organism. It is the characteristics of that trait.
Examples : When pigment is made in our eyes, height ( tall and short) , weight, blond hair is the phenotype for the blond hair genotype and skin colour( black, white ) is the phenotype trait.
Little Rock is right in the middle of the state so to figure out where the storm will go next you need the direction of the wind
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I think its B: Sliding filament mechanism
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The physical properties of matter can be measured precisely using tools, such as a triple beam balance, a graduated cylinder or beaker, a metric ruler, timing devices, or a thermometer.