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Review the Animal Kingdom 4 Major Characteristics? Multicellular Eukaryotic Heterotrophs Cells lack cell walls
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7 Essential Functions? Feeding Respiration Circulation Excretion Response Movement Reproduction
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Trends in Animal Evolution Cell specialization and levels of organization? Early development? Body symmetry? Cephalization? Coelom?
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Brain Encased Skull jaws Bony Skeleton Lungs Amniotic Egg Hard Shells Fur & Milk Glands
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Water flow Collar Cell Spicule Pore cell Pore Epidermal cell Archaeocyte Osculum Central cavity Pores The Anatomy of a Sponge
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Examples: hydra, coral, sea anemone Examples: jellyfish, portuguese man of war Cnidarians have two body forms Polyp - stationary, vase-shaped Medusa - swimming, cup-shaped
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Ecology of Sponges 1.Ideal habitats for marine animals such as snails, sea stars, sea cucumbers, and shrimp 2.Mutually beneficial relationships with bacteria, algae and plant-like protists
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Ecology of Cnidarians A. Source of new drugs/chemicals sunscreen 855 B. Provide habitats for marine organisms C. Source of food for other organisms (like sea turtles) D. Symbiotic relationships with other organisms
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3 Groups of Worms? Flatworms Roundworms Segmented Worms What do all 3 groups have in common? –Bilateral symmetry, cephalization, sexual reproduction, true organs,
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Flatworm adaptation? Simplest animals to have bilateral symmetry and cephalization.
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Roundworm Adaptation? First animals to have a one way digestive system with mouth and anus First animals to have a fluid filled body cavity called a pseudocoelom- “false body cavity”
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Segmented Worm Adaptation? First animals to have true circulatory system and coelom – body cavity.
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Examples of Mollusks?
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Major Advancement? Well developed nervous system
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4 parts to body? 1. Foot- 2. Mantle (covering) – 3. Shell – 4. Visceral mass – muscular and modified in each group: used for crawling, burrowing, or may form tentacles for capturing prey thin layer that covers most of the body and secretes the shell made of calcium carbonate – for protection area where internal organs are located.
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Classification of Mollusks? Classified into three common groups based on shell presence and type and foot modification 1. Gastropods 2. Bivalves 3. Cephalopods
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Echinoderms’ Adaptations Water Vascular System Radial symmetry Spiny Skin
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Types of Echinoderms Sea Stars Brittle Stars Sea Urchins Sand Dollars Sea Cucumbers
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Name characteristics of the arthropod phyla: Jointed appendages Body segments Exoskeleton Bilateral symmetry Reproduce sexually
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5 classes of arthropods Arachnids Centipedes Millipedes Crustaceans Insects
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Why are insects so successful? The ability to fly Rapid reproduction Waterproof exoskeleton Variety of food sources Small size
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A dramatic life form change from larvae to adult stages Metamorphosis
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Animal Behaviors II. Innate Behavior – behavior that doesn’t depend on learning experience Examples: babies cry, whales swim, Frogs jump.
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Innate behaviors
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III. Learned behavior – behavior that is learned from experience or observation ex: language in humans, reading, a dog learning tricks, using tools
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Learned Behaviors
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I. Survival Behaviors A.Obtaining Food: Hunting, Scavenging, Gathering B.Predator/Prey Relationships – Predators hunt/ Prey have behaviors to avoid being eaten
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1.Camouflage – Prey blends in to avoid being eaten 2.Defense - tools/behaviors – ex: porcupine quills, skunk’s odor 3.Warning Coloration – bright colors/patterns warns predators of toxins or poisons
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IV. Seasonal behavior – behaviors that animals exhibit during certain times of the year A.Migration – long distance travel to find food, water, safe nesting ground B.Hibernation – period of inactivity and decreased body temperature – survive on stored body fat C.Estivation – reduced activity in summer – common in desert animals
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V. Communication – When animals signal other animals A.Purpose: courtship (trying to find a mate), defending territory, warning other members of species of danger, where to find food
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B. Types of Communication: 1.Pheremones – chemical communication – usually smells. Ex: dog urinates to mark territory 2.Hearing – sound communication. Ex: whales click, birds sing, dogs bark and howl 3.Sight – visual communication. Ex: body language in humans, color displays of birds, lizards open a flap of colored skin on the neck 4.Touch – physical communication. Ex: bees touch antennae, primates groom
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