A pea plant with purple flowers (and unknown genotype) is crossed with a pea plant with white flowers. One-half of the offspring have purple flowers, and one-half have white flowers. What are the genotypes of the parent plants?

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so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

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tobey

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

allowed for the prediction of the properties of missing elements.