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Bellringer 5 minutes to finish your study guide We will go over the answers together in class.
Ch & 33 Animals Study Guide Answers!!!
Vocab Amniotic egg: reproductive organ surrounded by amniotic fluid and membranes for protection Cephalization: concentration of sensory/brain structures at the front of the body Dioecious: havign two distinct genders Endotherm: warm-blooded; stable internal temp Ectotherm: cold-blooded; controlled by environment Hermaphrodite: having both male and female reproductive organs
Vocab Contd Mandibles: mouth parts used for holding, chewing, biting, sucking Metamorphosis: changes in shape and body during development Molting: shedding exoskeleton and forming a new one Nematocyst: stinging cells Sessile: fixed to one place Spicules: tiny hard particles that make up the skeleton
1.List the 6 Characteristics that all animals have. -Multicellular, Eukaryotic, Heterotrophic, Have to digest food, Lack cell walls, Ability to move 2. Draw a four legged animallabel the four anatomical directionsanterior/ventral, posterior/dorsal, superior and inferior. Dorsal/Posteriortowards the back Ventral/Anteriortowards the front Superiortowards the head Inferiortowards the bottom
3. Explain the three types of symmetry and name one animal with each. Radial- body can be cut through any plane and be exactly alike (Ex: Starfish) Bilateral – body can be cut in two with both halves being exactly alike. (Ex: Humans) Asymmetry--body with an irregular shape (Ex- Sponges) 4. Explain the 2 types of digestive systems (complete vs. incomplete) and name one animal with each Incomplete digestive system: one opening; food and waste enter and exit from the same opening Complete digestive system: two openings; food enters the mouth and wastes exit the anus
5. Explain the 2 types of circulatory systems (closed vs. open). Open circulationfluid pumped from vessels into body cavity, then returned to vessels (Ex. arthropods and most mollusks) Closed circulation-- fluid stays in vessels (Ex. some mollusks, higher invertebrates, and all vertebrates) 6. Explain the 2 types of fertilizationnumber of eggs for each??? (internal vs. external) External fertilization- egg and sperm are released into the water; large numbers of eggs Internal fertilization- eggs are fertilized by sperm inside the mothers body; fewer numbers of eggs
7. Which vertebrates are ectothermic? Which are endothermic? EctothermicChondrichthyes, Osteichthyes, Amphibia, Reptilia EndothermicAves, Mammals 8. What class of invertebrates will sting you? --Cnidarians 9. How many legs do insects have? How many legs do arachnids have? --Insects: 6--Arachnids: 8
10. What does the name Echinodermata mean?Chondrichthyes? Osteichthyes?Amphibian? Name one animal in each group. Echinodermataspiny skinnedstarfish Chondrichthyescartilage fishshark OsteichthyesBone fishcatfish Amphibiadouble lifefrog 11. List the 5 Characteristics that all Chordates have. 1.*Have a dorsal notochord, that becomes the spine. 2.An endoskeleton made of cartilage or bone. 3.Pharyngeal slits or gill pouches during development. 4.A dorsal nerve cord. 5.Post-anal tail
12. List the 6 classes of Vertebrates and two animals that belong to each. Then list two traits about each class (appearance mostly) -Chondrichthyes: (sharks/rays)--have fins and scales, breathe with gills. -Osteichthyes: (salmon/perch)--have fins and scales, breathe with gills. -Amphibia: (frogs/salamanders)--smooth, moist skin, no claws or scales - Reptilia: (snakes/lizards)--body covered w/scales or plates, have lungs/scales & plates/claws -Aves: (robin/ostrich)-- have wings and feathers, parents incubate eggs -Mammals: (whales/humans)-- have hair & mammary glands, have a diaphragm
13. What is unique about a monotreme mammal? A marsupial mammal? Name an animal of each group. Monotemeonly mammals that lay eggs (platypus) Marsupialcarry their young in a pouch (kangeroo) 14. What makes an animal a vertebrate? An invertebrate? Vertebrate = backbone Invertebrate = no backbone
15. Copy the following prompts. Then name the vertebrate class that was the first in the evolutionary sequence to have each trait. a. Three chambered heart = Amphibia b. Internal fertilization = Reptilia c. Use of an amniotic egg = Reptilia d. Warm-blooded = Aves e. Four chambered heart = Aves f. Birth to live young = Mammals