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| fan shaped membranes that are used for balance, swimming and steering |
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| A line of fluid filled canals running along the sides of a fish that enable it to detect movement and vibrations in the water |
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| Thin bony plates formed from the skin |
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| Method of reproduction in fishes and some other animals where a large number of eggs are fertilized outside the body |
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| A thin walled, internal sac found just below the backbone in most bony fishes |
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| An animal that has a varialbe body temperature and gets its heat from external sources |
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| Sound producing bands at tissue in the throat |
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| Provides nourishment to the embryo and contains membranes that protect it while it develops in a terresterial enviroment |
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| In snakes, a pitlike sense organ on the root of the mouth that picks up and analyzes airborn chemicals |
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| An animal that maintains a nearly constant body temperature that is not dependent on the enviromental temperature |
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| A lightweight, medified protein scale that provides insulation and enables flight |
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Where birds sit on their eggs to keep them warm |
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| A large breastbone that provides a site for muscle attachment |
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| The sheet of muscle located beneat the lungs that seperates the chest cavity from the abdominal cavity, where other organs are located |
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| A group of cells that secrete fluids |
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Possibly modified sweaqt glands, which produce aand secrete milk, a liquid that is rich in fats, sugars, proteins, milerals, and vitamins |
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| The time during which placental mammals develop inside the uterus |
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| A mammal in which the young have a short period of development within the mothers body followed by a period of development inside a pouch made of skin and hair on the outside of the mothers body |
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| A mammal that reproduces by laying eggs |
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| Organ that provides food oxygen to and removes waste from young inside the uterus of placental mammals |
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| Give birth to young that have developed inside the mothers uterus until their body sytemes are fully functional and they can live independently of their mother's body |
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| Had feathers of both reptiles and mammals |
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| A hollow, muscular organ in which offspring develope |
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| Used to intimidate another animal of the same species |
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| Anything an animal does in response to a stimulus |
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| 24 hour, light-regulated,sleep/wake cycle of behavior |
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| The behavior that males and females of a species carry out, before mating |
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| A form of social ranking wihtin a group in which some individuals are more subordinate than others |
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| A state of reduced metabolism that occurs in animals living in condtions of intense heat |
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| Automatic response controlled by hormones that prepares the body to either fight or run from danger |
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| period of inactivity where animals go into a deep sleep during parts of the cold winterr months |
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| Inherited behavior of animals |
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A complex pattern of innate behavior |
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The instinctive, seasonal movement of animals |
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| A simple,automatic response to a stimulus that involves no conscious control |
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| A physical space an animal defends against other members of its species |
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An exchange of information that results in a change of behavior |
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| Occurs when an animal is repeatedly given a stimulus that is not associated with and punishment or reward |
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| A form of learning in which an animal at a specitic critical time of its life, forms a social attachment to another object |
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| Learning in which an animal uses previos experiance to respond to a new situation |
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| The use of symbols to represent ideas |
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An internal need that cause an animal to act |
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| An animal recieves a reward for making a paricular response |
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