Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 46.2, Problem 4TC
Agricultural biotechnologists have developed genetically modified tomato plants in which ethylene production is blocked. Why might such a plant be valuable to tomato growers?
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A majority of genetically engineered crops in production worldwide today have been engineered with a gene that:
A) codes for a protein that improves the nutrient value of the food
B) codes for a protein which makes the crop resistant to the herbicide Roundup
C) codes for a protein that allows the plant to thrive in a high-salt environment
D) codes for a protein that suppresses the production of allergens in the food
Much of the controversy over genetically engineered foods has centered on whether special labeling should be required on all products made from genetically modified crops. Some people have advocated labeling that identifies the product as having been made from genetically modified plants. Others have argued that food labeling should be required to identify only the ingredients, not the process by which they were produced. Choose a side in this issue and justify your stand.
A nine-year research and experimentations have successfully developed rice plants with golden hue kernels instead of the usual white kernels. What is the advantage of this modified rice plant?
Select one:
To make the plant become resistant to herbivores.
To provide sufficient rice produce due to its shorter cycle.
To add nutritional value to the rice kernels.
To allow easy harvesting and processing.
Chapter 46 Solutions
Biology
Ch. 46.1 - list six important types of plant hormones?Ch. 46.1 - Prob. 2CYLCh. 46.2 - Explain how the Darwin experiments using caps and...Ch. 46.2 - Prob. 1CTCh. 46.2 - Prob. 2TCCh. 46.2 - Prob. 3TCCh. 46.2 - Agricultural biotechnologists have developed...Ch. 46.2 - explain the roles of plant hormones in seed...Ch. 46.2 - Prob. 2CYLCh. 46.2 - Prob. 3CYL
Ch. 46.2 - Prob. 4CYLCh. 46.2 - Prob. 5CYLCh. 46.2 - Prob. 6CYLCh. 46.3 - Although insects are major plant predators,...Ch. 46.3 - Prob. 1HYEWCh. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - Prob. 3CYLCh. 46.3 - Prob. 4CYLCh. 46.3 - Prob. 1TCCh. 46 - Prob. 1MCCh. 46 - Prob. 2MCCh. 46 - Prob. 3MCCh. 46 - Prob. 4MCCh. 46 - Prob. 5MCCh. 46 - Prob. 1FIBCh. 46 - Prob. 2FIBCh. 46 - Prob. 3FIBCh. 46 - Prob. 4FIBCh. 46 - The hormone _________ causes stomata to close when...Ch. 46 - Compare phototropism and gravitropism in roots and...Ch. 46 - Prob. 2RQCh. 46 - What is a phytochrome? How do the two forms of...Ch. 46 - Which hormones cause fruit development? Which...Ch. 46 - What is senescence? Describe some changes that...Ch. 46 - Prob. 6RQCh. 46 - Describe one example of a plant chemical defense...Ch. 46 - Describe how a sensitive plant closes its leaves....Ch. 46 - A student reporting on a project said that one of...Ch. 46 - Prob. 2AC
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- Artificial leaves are beginning to be developed by biotechnology companies. Outline the basic characteristics that an artificial leaf would need to have to manufacture a sugar.arrow_forwardGenetically modified organisms (GMOs) are used to create human growth hormone, insulin and clotting factor proteins that are used to treat dwarfism, diabetes and hemophilia respectively. Several crops such as corn and soybean have also been genetically modified in order to facilitate either the management or growth of these crops. Why do you think there is push back or opposition against the use of GM food crops but not in the use of products such as insulin, which is also created using GMOs?arrow_forwardCorn has been genetically engineered to produce the anti-insect poison of a bacterium Bacillus thuringiensis. What is one benefit of this? What are some of the risks?arrow_forward
- Explain about Insect-Resistant GM Crops ?arrow_forwardHow do you know that there will not be any long-term consequences to humans or animals from the consumption of food or feed that contains products from biotechnologically enhanced plants?arrow_forwardWhat are the pros and cons of genetically modified crops?arrow_forward
- Some crop plants are modified genetically by manipulating their genes. How are they made beneficial?arrow_forwardA crude extract sample was obtained from a plant and was found effective as an anti-diabetic agent in-vitro. The researcher wants to determine the appropriate lethal dose of the sample because it was intended to be administered orally. Literature studies show that plants under the same genus with the source of the crude extract has a lethal dose of 300 mg/Kg BW. Your group performed the test following the OECD Guideline 423 and used the recommended starting dose. The derived approximate LD50 was 25 mg/Kg BW. 1.With the approximate LD50 of the plant sample tested in the case, determine and interpret the TI of the sample if the ED50 is: A. 40 mg/Kg BW B. 18 mg/Kg BW C. 3 mg/Kg Bwarrow_forwardA crude extract sample was obtained from a plant and was found effective as an anti-diabetic agent in-vitro. The researcher wants to determine the appropriate lethal dose of the sample because it was intended to be administered orally. Literature studies show that plants under the same genus with the source of the crude extract has a lethal dose of 300 mg/Kg BW. Your group performed the test following the OECD Guideline 423 and used the recommended starting dose. The derived approximate LD50 was 25 mg/Kg BW. Why would a drug with a TI of less than 1 be considered as the primary treatment of a certain disease?arrow_forward
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