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Nutrition in Animals Test - 11

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Nutrition in Animals Test - 11
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  • Question 1
    1 / -0
    Dentine is
  • Question 2
    1 / -0
    Number of teeth in human which grow twice are
    Solution
    A normal human has 20 teeth which they lose through their childhood known as deciduous teeth. They are the temporary teeth that usually begin to fall out at the age of 6 and are gradually replaced by adult teeth over a period of several years. 
  • Question 3
    1 / -0
    Partially digested food in ruminants is  
    Solution
    • The animals which partially digest food have a four-chambered stomach and the process of digestion is as follows: 
    • The food is chewed and swallowed quickly and passed into the first stomach called Rumen. So, the animals are referred to as ruminants. 
    • Then the microorganisms help in breaking down the food and this partially digested food is called cud. 
    • Hence, Partially digested food in ruminants is cud.
    So, the correct answer is 'cud'.
  • Question 4
    1 / -0
    Digestive system has _________ muscles.
  • Question 5
    1 / -0
    Red worms do not chew but grind their food with the help of ________.
  • Question 6
    1 / -0
    Bulk of the tooth in mammals is made up of:
    Solution
    Dentine is a calcified tissue of the body, and along with enamel, cementum, and pulp is one of the four major components of teeth. It is usually covered by enamel on the crown and cementum on the root and surrounds the entire pulp. 
    By weight, 70% of dentin consists of the mineral hydroxyapatite, 20% is organic material, and 10% is water. Yellow in appearance, it greatly affects the color of a tooth due to the translucency of enamel. 
    Dentine, which is less mineralized and less brittle than enamel, is necessary for the support of enamel. 
    So, the correct answer is option A- 'Dentine'. 

  • Question 7
    1 / -0
    Hardest substance of the body is
    Solution
    Hardest substance of the body is enamel. It is the thin outer covering of the tooth. It is composed of hydroxyapatite, which is a crystalline calcium phosphate. The color can vary from light yellow to a grayish white. It protects the tooth.
    So, the correct answer is 'Enamel'.
  • Question 8
    1 / -0
    The hardest substance in human body is
    Solution
    Teeth are the hardest substance in the human body. The enamel on your teeth is the hardest and most highly mineralized substance in your body. It covers the outer layer of each tooth and it is the most visible part of the tooth. The enamel is made up mostly of minerals, primarily hydroxyapatite. So, enamel is the hardest substance in our body compared to dentine, collagen and melanin. 
    Therefore, the correct answer is option D.
  • Question 9
    1 / -0
    Which teeth in humans are suitable for tearing flesh?
    Solution
    Canine teeth are the slightly pointed teeth that are located on each side of the incisor teeth at the front of the mouth. The primary function of canines is tearing. 
    Hence, option B is the correct answer.
  • Question 10
    1 / -0
    The tooth with three roots is
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