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

question 15

Multiple Choice

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. Five sample bags of rice seed arrive at a lab that includes both GMO blight-resistant rice and rice that does not have the disease-resistant gene. Assuming the scientist has a known sample of the blight-resistant rice, how might she determine bags contain additional samples of this rice strain?

• A) by using a DNA profile
• B) by developing a genetic marker
• C) by inserting the gene into a plasmid
• D) by extracting stem cells

---

Definitions:

Present Value

The present valuation of money to be received in the future or recurrent cash inflows, accounting for a chosen rate of interest.

Compounded Annually

Interest on an investment or loan calculated once a year, where each year's interest payment includes interest on the original principal and on the accumulated interest of previous periods.

Market Rate

The prevailing rate or price at which goods, services, or securities are traded in a competitive marketplace.

Bond Issue

The method through which a corporation or governmental entity generates capital by issuing bonds to investors.