Adaptation to diet. Different animals have different sets of teeth depending on the type of food that they eat:
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1 Adaptation to diet Different animals have different sets of teeth depending on the type of food that they eat: 1. Herbivore plants (teeth for grazing and grinding) 2. Carnivore animals/meat (teeth for shearing and cutting) 3. Omnivore everything (versatile teeth for both plants and meat)
2 Herbivores
3 Carnivores
4 Omnivores Cockroach Bear
5 A generalist species is able to thrive in a wide variety of environmental conditions and can make use of a variety of different resources has a varied diet.
6 A specialist species can only thrive in a narrow range of environmental conditions has a very limited diet.
7
8 Human Teeth Two sets: 1. Primary or deciduous (baby teeth/milk teeth) 2. Permanent (32 total) (third molars = wisdom teeth) 8
9 Teeth are classified according to shape and function Incisor There are four main types of teeth: Canine (eyetooth) Premolar Molar 1. Incisors 2. Canines 3. Premolars 4. Molars 9
10 Incisors! These are chisel-shaped cutting teeth, used for biting or chopping off pieces of food.
11 Incisors gripping, biting and cutting Incisors gripping, biting and cutting 11
12 Canines! These are long and cone shaped - sharp teeth that are used to pierce, hold and tear food.
13 Incisors gripping, biting and cutting Canines sharp teeth for tearing and biting Canines sharp teeth for tearing and biting Incisors gripping, biting and cutting 13
14 Premolars! These teeth are used to crush and grind soft food.
15 Incisors gripping, biting and cutting Canines sharp teeth for tearing and biting Premolars (bicuspid) flat teeth for chewing, crushing and grinding Premolars (bicuspid) flat teeth for chewing, crushing and grinding Canines sharp teeth for tearing and biting Incisors gripping, biting and cutting 15
16 Molars! These teeth have broad crowns (with 4-5 rounded cusps) used for chewing and grinding hard food.
17 Incisors gripping, biting and cutting Canines sharp teeth for tearing and biting Premolars (bicuspid) flat teeth for chewing, crushing and grinding Molars (4-5 rounded cusps) flat teeth used for chewing, crushing and grinding Premolars (bicuspid) flat teeth for chewing, crushing and grinding Canines sharp teeth for tearing and biting Incisors gripping, biting and cutting 17
18 What kind of teeth do humans have?
19 What kind of teeth does a sheep have?
20
21 Horse
22 What kind of teeth do cats have?
23
24 24
25 Types of teeth, tooth shape and function Type of mammal Type of tooth Tooth shape Tooth function Herbivore Incisor and canines Small and chisel shaped Gripping and tearing plants Premolar and molar Large and broad Grinding and chewing Incisor Pointed and sharp Biting Carnivore Canine Pointed and sharp Tearing, killing and holding pray Premolar and molar Scissor-like or flattened Slicing and crushing bones Incisor Chisel shaped Biting / cutting Omnivore Canine Pointed and sharp Tearing / biting Premolar and molar Flat (2 or 4 cusps) Tearing / chewing / crushing / grinding Activity: Inspect the animal sculls available and answer the following questions in the table provided: 25
26
27 Activity: Inspect the animal sculls available and answer the following questions in the table provided: 1. Note the types of teeth you observe - incisors, canines, premolars and molars. 2. Describe what they look like - their shape (use the table above to help you with the description). 3. Describe the tooth function - keep in mind this is your opinion (use the table above to help you). 4. Based on your findings, predict the type of diet this animal has and explain why you think so in the conclusion section of the table. 5. Use your knowledge to predict what animal it is from the list provided, explain your reasoning. Case study No. Animal: Human Diet: Type of tooth Tooth shape Tooth function Omnivore Incisor Chisel shaped Biting and cutting Canine Pointed and sharp Tearing and biting Premolars and molars Conclusion: Flat Tearing, chewing, crushing and grinding I think this animal is an omnivore because the scull/jaw has four types of teeth which I think are versatile and suitable for biting, chewing and grinding which allows eating a variety of foods. I think this this is a human scull and teeth. 27
28 Kookaburra
29 1. Sheep
30 2. Rhesus macaque 30
31 3. Tasmanian devil
32 4. Koala
33 5. Chimpanzee
34 6. Domestic cat
35 How well did you do? 35
36 Tooth types of bony fish 36
37 Spotted eagle ray
38 Baleen whale
39 39
40 40
41 Octopus 41
42 Goanna 42
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