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A-1. A-2. A-3. B-1. B-2. B-3. C-1. C-2. C-3. D-1. D-2. D-3. E-1. E-2. E-3. F-1. F-2. F-3. G-1. G-2. G-3. H-1. H-2. H-3. Name-1. Name-2. Name-3. Name-4. Name-5. Name-6. Many invertebrates have a simple body, how does this benefit the organism?.

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  1. A-1 A-2 A-3 B-1 B-2 B-3 C-1 C-2 C-3 D-1 D-2 D-3 E-1 E-2 E-3 F-1 F-2 F-3 G-1 G-2 G-3 H-1 H-2 H-3 Name-1 Name-2 Name-3 Name-4 Name-5 Name-6

  2. Many invertebrates have a simple body, how does this benefit the organism?

  3. Can regenerate or replace lost body parts, easier to reproduce

  4. Explain why many larger invertebrates live in the ocean

  5. The water supports their bodies since they have no bones

  6. What is the difference between an exoskeleton and an endoskeleton? Give an example of an organism with each type.

  7. Exoskeleton-skeleton on the outside (like a suit of armor)ex-insects, crustaceans, arthropods, etc.Endoskeleton-internal skeleton ex-echinoderms, sponges, etc

  8. Name 3 characteristics that all members of Phylum Arthropoda share.

  9. An exoskeleton, jointed appendages and segmented bodies

  10. What are the names of the 3 classes of arthropods we studied in class?

  11. Insecta, Crustacea and Arachnida

  12. Give 3 reasons why a dragonfly is a member of Class Insecta.

  13. Answers will vary-6 legs, 2 pairs of wings, 1 pair of antennae, three body segments (head, thorax and abdomen)

  14. Name 2 reasons why earthworms are beneficial to the soil.

  15. Loosen the soil, make soil more fertile, allow air/water/roots to move

  16. Explain the relationship between a dog and a tapeworm.

  17. The dog is the host to the tapeworm, the tapeworm is a parasite to the dog. The worm gets its nutrients from the dog which harms the dog.

  18. Phylum Platyhelminthes, Phylum Nematoda and Phylum Annelida are the three groups of worms we studied in class. What is the main characteristic that separates these into different phyla? Which is which?

  19. Shape of the worm separates the worms into different groups (flat-round-segmented) Annelida=segmented worms, Platyhelminthes=flat worms and Nematoda=roundworms

  20. A sea star can replace a lost limb by what process? Describe the process.

  21. Regeneration-when a sea star loses an arm, it can grow a new arm through regeneration

  22. What 2 structures do sea stars use to move and capture prey?

  23. Arm and tube feet

  24. What are 2 characteristics that all Echinoderms share?

  25. Endoskeleton and radial symmetry

  26. Describe how a nematocyst works.

  27. Threads shoot out and release poison into prey which paralyzes it. Located on tentacles and are activated when prey touches.

  28. What are the two body shapes for cnidarians? Draw a sketch of each.

  29. Polyp and Medusa

  30. What type of reproduction did the slides that you observed of the hydra show? Describe this type of reproduction, don’t just say the name!

  31. Budding- a type of asexual reproduction. Budding is when a new organism grows off the parent’s body. Only involves one parent and offspring is identical to parent.

  32. What does the word “Porifera” mean and what does that have to do with sponges?

  33. It means “Pore-Bearing” and sponges have thousands of tiny pores (holes) all over their bodies

  34. Explain how sponges obtain their food.

  35. They filter (strain) it from the water. They are then called filter feeders.

  36. What characteristic do sponges and echinoderms share that helps protect them?

  37. They both have a spiny internal skeleton

  38. What is a radula?

  39. Rows of teeth used to break up food. Found in Molluks.

  40. Name and describe the method that Cephalopods use to swim.

  41. Jet propulsion-they shoot water out in one direction which moves them in the opposite direction. Organ that performs this is called a siphon.

  42. What does “Gastropod” mean and why are they named that?

  43. “Stomach Foot” because their stomach is on the same side as their foot

  44. What class of vertebrates has a 3 chambered heart, claws on their feet, lay their eggs on land and are ectothermic?

  45. Class Reptilia

  46. What is the difference between ectothermic animals and endothermic animals?

  47. Endothermic animals can regulate their own body temperature. Ectothermic animals can not regulate their own body temperature, it changes with their outside environment.

  48. Match the picture of the organism to the group of invertebrates it belongs to. 2 1 • Phylum Porifera • Phylum Echinodermata • Phylum Arthropoda • Phylum Cnidaria 3 4

  49. 1. D-Phylum Cnidaria 2. A-Phylum Porifera 3. B-Phylum Echinodermata 4. C-Phylum Arthropoda

  50. Name the phylum that the organism belongs to. Christmas Tree Worm

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