Which of the following statements is not a function of saliva? 1. It helps to grind and tear food 2. It helps to dissolve food particles 3. Is contains enzyme amylase 4. It lubricates the food passageway What is generally true of artificially selected crops such as potatoes and corn that are planted in large numbers using only a single variety of the plant? 1. The crops are very resistant to infectious diseases, pests, and other evolutionary forces 2. The crops have little genetic diversity, and are very susceptible to evolutionary forces 3. The crops have little genetic diversity, and are very resistant to infectious diseases 4. The crops are not resistant to evolutionary forces, but do have excellent genetic diversity

Which of the following statements is not a function of saliva? 1. It helps to grind and tear food 2. It helps to dissolve food particles 3. Is contains enzyme amylase 4. It lubricates the food passageway What is generally true of artificially selected crops such as potatoes and corn that are planted in large numbers using only a single variety of the plant? 1. The crops are very resistant to infectious diseases, pests, and other evolutionary forces 2. The crops have little genetic diversity, and are very susceptible to evolutionary forces 3. The crops have little genetic diversity, and are very resistant to infectious diseases 4. The crops are not resistant to evolutionary forces, but do have excellent genetic diversity

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 2ACQ: Figure 16.7 Which of the following statements about the digestive system is false? a. Chyme is a...

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Which of the following statements is untrue? a. Roughage takes a long time to digest. b. Birds eat large quantities at one time so that they can fly long distances. c. Cows do not have upper teeth. d. In pseudo-ruminants, roughage is digested in the cecum.
Figure 16.7 Which of the following statements about the digestive system is false? a. Chyme is a mixture of food and digestive juices that is produced in the stomach. b. Food enters the large intestine before the small intestine. c. In the small intestine, chyme mixes with bile, which emulsifies fats. d. The stomach is separated from the small intestine by the pyloric sphincter.
The human AMY-1 gene encodes salivary amylase, an enzyme that breaks down starch. The number of copies of this gene varies, and people who have more copies generally make more of the enzyme. In addition, the average number of AMY-1 copies differs among cultural groups. George Perry and his colleagues hypothesized that duplications of the AMY-1 gene would confer a selective advantage in cultures in which starch is a large part of the diet. To test this hypothesis, the scientists compared the number of copies of the AMY-1 gene among members of seven cultural groups that differed in their traditional diets. The Figure shows their results. Starchy tubers are a mainstay of Hadza hunter-gatherers in Africa, whereas fishing sustains Siberias Yakut. Almost 60% of Yakut had fewer than 5 copies of the AMY-1 gene. What percentage of the Hadza had fewer than 5 copies? FIGURENumber of copies of the AMY-1 gene among members of cultures with traditional high-starch or low-starch diets. Source: G. Perry et al. 2007. Diet and the evolution of human amylase gene copy number variation. Nature Genetics 39:12561260.
e) why is vegetarianism a more energy intensive process (from the organism standpoint) than being omnivores? [DON'T EVEN THINK OF STATING ANYTHING ABOUT FIBER, BULK, AND/OR CELULOSE!!!!]
Which of the following nutrients in food are most efficiently metabolized by microflora of ruminant animals? Select one: a. Lipids b. Proteins c. Carbohydrates d. Vitamins
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All are protein rich food except a. cheddar cheese b. tofu c. sardines d. edamame in pods e. none of the above
Humans need food to provide energy.What other necessary component does foodprovide for the body?O A. Digestive enzymesO B. Raw materials to build structuresO C. HormonesO D. Oxygen