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Intro to Animal Science
Chapter 1 Questions
4. Animal Science is separated into different groups which are specialties. The different groups are genetics, nutrition, physiology, animal health, ethology, meat science, dairy product science, and biotechnology. Each group helps learn and study the pieces of Animal Science easier. For example, animal breeding is the use of biometry and genetics to improve farm animal production. Genetics is one of the specialties and is also tied in with something called the genetic code. Each specialty is connected to something else and gets all combines into one to define Animal Science.
8. On page 8 of our textbook, the diagram 1-2 shows that 17.21% of animal productions are contributions of food sources to human energy consumption. Then below in diagram 1-3, animal products are a 38.5% contribution of food source to human protein consumption. The highest percentage in both diagrams is from meat and offal, which meat has a higher nutrient level than a calorie level.
12. Nutrient density foods contain a measurement of the nutrients provided in a food compared to the calories, such as meat. Other examples of nutrient density foods would be salmon, kale, seaweed, garlic, shellfish, potatoes, sardines, blueberries, egg yolks, and dark chocolate. According to an article from The George Mateljan Foundation, eating nutrient dense food is one of the healthiest ways to eat. The reason why is; “Because it gives you concentrated amount of valuable nutrients such as vitamins, minerals, fiber, essential fatty acids and phytonutrients” (Matelijan, 2001-2016).
13. There are many products out there that are made from by-products. One of the examples from the book are manure for fertilizer. Crayons, cosmetics, glass, soap, and animal feed are also some of the other examples from the book. Some products that are made from by-products that are not in the book are other foods like marshmallows and even medicine from cattle organs and glands.
19. Livestock revolution is “large increases in supply and demand of livestock and animal products worldwide at the end of the 20th century and into the 21st century.” (Damron, Page 13) One of the challenges of the livestock revolution is the increasing of the world’s human population. The demand for most animal products are in developing countries and those countries are expected to produce the majority of meat and milk. On the Agricultures Network website, Leah Garces has mentioned that small farmers are losing business and being pushed out of business by factory farming. Garces metions “…there were 5.7 million farms in the USA, in 1950. Today, the number has decreased to about 2 million farms.” (Garces 2011)
Damron, W. Stephen. (2013). Introduction to Animal Science. New Jersey.
Pearson Education, Inc. Pages (3-15)
Factsaboutbeef. (2013). There’s a Cow in My Marshmallow?! Facts About Beef.
Retrieved from https://factsaboutbeef.com/tag/cattle-by-products/
Garces, Leah. (2011). The ‘Livestock Revolution’ and its impact on smallholders.
AgriCultures Network. Retrieved from http://www.agriculturesnetwork.org/magazines/global/livestock-which-way/the-livestock-revolution-and-its-impact-on
Gunnars, Kris. (2014). The 11 Most Nutrient Dense Food on The Planet. RSS 20.
Retrieved from https://authoritynutrition.com/11-most-nutrient-dense-foods-on-the-planet/
Mateljan, George. (2016). What is nutrient density and why is it so important?
The World’s Healthiest Foods.
Retrieved from http://www.whfoods.com/genpage.php?tname=george&dbid=81