Biology Chapter 18
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the use of the down feather on the animals in the Class Aves? | insulation | Shell: | lime; thick outer coating
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| What is the use of the contour feather on the animals in the Class Aves | Flight, shape, and color | Amnion: | sac surrounding the embryo of the egg
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| what body shape does the birds have? | spindle-shaped with head, neck, trunk, and tail. | Amniotic fluid: | protects and moistens the embryo of the egg
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| the neck of the birds are usually what? | long and flexible | Embryo: | developing bird
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| Class Aves bones are made up of what type of bone? | hollow bones | Chorion: | Membrane around embryo and yolk sac
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| the sternum of the birds are usually what? | keeled | Yolk sac: | Nutrients for the developing bird
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| The Clavicle of the birds is usually what? | fused | Blood Vessels: | Leads to embryo from yolk sac
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| How many heart chambers does the Class Aves have? | 4 chambers | Allantois: | respiration; receives waste
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| are Class Aves animals endothermic or ectothermic and what does it mean? | Endothermic, meaning warm-blooded | Albumin: | Egg white: unfertilized egg
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| The digestive system of the bird has what? | crop and gizzard | Air space: | provides cushioning and air supply: unfertilized egg
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| Why are birds often seen eating sand? | the grit they pick up assist in the grinding of food in the gizzard | Shell membrane: | Becomes chorion; underneath shell; unfertilized egg
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| what structure in birds is used for sound? | the syrinx | Yolk: | Nutrient source; unfertilized egg
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| what does the excretory system of the birds lack and contain? | they lack bladders, but contain a pair of kidneys that empty continually. | Chalaza: | Helps suspend embryo and yolk sac; unfertilized egg
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| what does the reproduction of Class Aves look like? | Class Aves are oviparous with and egg enclosed in lime-containing shell. |
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| what does precocial mean? | it means a longer gestation period, and when the egg hatches, the animal will be prepared for life. |
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| What does altricial mean? | it means the gestation period is shorter and when born, the animal is helpless. |
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| What is preening? | it is the spreading of oil by birds to keep feather neatly arranged. |
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| What are the 4 ways a bird keeps lightweight? | One, the have hollow bones, two, their digestive system empties continually, three, their kidneys empty continually, and four, their air sacs are never full. |
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| What animals do the Class Aves hold? | the birds |
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| What body covering is crucial for an organism to be categorized in the Class Mammalia? | hair or fur |
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| what are a few types of hair? | guard hair, under hair, and whiskers |
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| what is structure used for eating that all mammals have? | teeth |
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| what are the three different types of teeth? | incisors, canines, and molars. |
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| what is the function of the incisors? | cutting |
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| what is the function of the canines? | tearing |
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| what is the function of the molars? | chewing and grinding |
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| how many pairs of limbs do mammals usually have? | 2 pairs designed for running, climbing, digging, grasping, swimming, or flying |
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| how do mammals breath? | with lungs |
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| What structure, between the thorax and abdomen of mammals, assists in breathing? | the diaphragm |
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| how many heart chambers does the mammals have? | 4 chambers |
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| are animals in Class Mammalia endothermic or ectothermic and what does it mean? | endothermic, meaning warm-blooded. |
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| what is the reproduction of the Class Mammalia? | viviparous with young sustained in uterus by placenta and an umbilical cord; some are oviparous and lack placenta. |
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| what is a characteristic given to the Class Mammalia dealing with the feeding of young? | milk secreted by mammary glands |
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| Order Monotremata is home to what Mammals? | the duck-billed platypuses with are egg-laying mammals(Oviparous) |
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| Order Marsupialia is home to what Mammals? | the kangaroos, koalas, and opossums, which are pouched mammals who lack placenta |
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| What are the characteristics of the Oder Rodentia of the placental Mammals? | they are the chewing mammals, like the rats, squirrels, mice, porcupines, and beavers, whose incisors grow constantly |
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