<span> A </span>test cross<span>, involves the breeding of an individual with a phenotypically recessive individual.
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Carbohydrates, lipids, and nucleic acids
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Models are used to stimulate reality and make predictions
Porous and Impermeable Rock These pores, or tiny holes, result in the rock's porosity. If water can move through a rock, the rock is permeable. Eventually, the water reaches a layer of rock that is not porous. This rock is impermeable.
