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Rice Is the Primary Nutrient Source for About One-Third of Humanity-Approximately

question 32

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Rice is the primary nutrient source for about one-third of humanity-approximately 2 billion people worldwide. One major disease of this crop, called rice blight, is caused by a bacterium Xanthomonas oryzae . This disease causes the rice plant to turn yellow and wilt and can affect up to 50 percent of the crop. Wild forms of rice have a natural resistance to the Xanthomonas bacterium, but these wild forms are not usable as crop plants. Scientists have developed a blight-resistant strain, using genetic engineering. Strains of blight-resistant rice have been grown successfully in several countries. Assume some types of wild rice produce seeds of two different colors-brown and white. If you cross two plants and end up with three seed colors-brown, tan, and white, you would correctly assume that this trait __________.

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Definitions:

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The tightening and shortening of muscle fibers in response to stimulation, producing movement or tension.

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A vital structure forming inside the uterus throughout pregnancy, supplying the developing fetus with oxygen and necessary nutrients while also eliminating waste materials.

Embryonic Period

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