Life Science Chapter 9 Test Review Questions & Answers

Life Science Chapter 9: Sponges, Cnidarians, and Worms Test Review Answers

1. What are characteristic shared by all animals?
a. Animals are composed of many cells
2. What is a vertebrate?
a. An animal with a backbone
3. What is an invertebrate?
a. An animal without a backbone
4. Which of the following animals have radial symmetry? A sea anemone, a butterfly, a rabbit, or a fish?
a. Sean anemone
5. What is bilateral symmetry?
a. One line can be drawn to divide the animal into halves that are mirror images
6. How does a sponge obtain its food?
a. Collar cells filter the food from the water
7. What is the function of spikes in a sponge?
a. Protect the sponge’s body
8. What does a cnidarian use to capture prey?
a. Stinging cells
9. What makes up a coral reef?
a. Skeletons of dead corals
10. What kinds of animals are found in a coral reef?
a. Invertebrate and vertebrates
11. What are the three major kinds of worms?
a. Roundworm, flat worm, & segmented worm
12. What are three types of flatworms?
a. Tapeworm, fluke, & planarian
13. Describe a roundworm’s digestive system?
a. It is like a tube that is open a each end
14. Describe a segmented worm’s circulatory system.
a. It is a closed system; moves blood in a network of vessels
15. What is sexual reproduction?
a. A new organism forms from the joining of egg and sperm
16. Describe a coral polyp at the beginning of its life.
a. It attaches to a solid surface
17. What are the characteristics of an animal with radial symmetry?
a. They have no distinct head or tail ends
18. What phyla do worms belong to?
a. 3 Phyla: Flat worms belong to Phylum Platyhelminthes; roundworms belong to Phylum Nematoda; segmented worms belong to Phylum Annelida
19. How do sponges reproduce sexually?
a. Water carries sperm from one sponge to eggs in another sponge
20. What characteristics do all worms share?
a. They have a brain
21. What are organisms that grow on land or in other organisms called?
a. Parasites
22. What type of symmetry do the bodies of cnidarians have?
a. Radial symmetry
23. What do earthworms do to the soil?
a. They make it more fertile with their wastes and they loosen the soil which allows air, water, & plant roots move through it
24. What phylum do sponges belong to?
a. Phylum Porifera
25. What are the major functions of animals?
a. Obtaining food & oxygen, movement, keeping internal conditions stable, and reproduction
26. What is a balanced arrangement of parts called?
a. Symmetry
27. In round worms, where do wastes exit?
a. Anus
28. What type of worm is the most abundant on Earth?
a. Roundworms
29. What is fertilization?
a. The joining of an egg cell and a sperm cell
30. What is asexual reproduction?
a. The process by which a single organism produces a new organism identical to itself
31. What is an organ?
a. A group of several tissues that perform a specific function
32. What is an invertebrate?
a. An animal without a backbone
33. What types of symmetry can an animal have?
a. Radial symmetry, bilateral symmetry, or no symmetry
34. What type of symmetry does a jellyfish have?
a. Radial
35. What is a larva?
a. An immature form of an animal that looks very different than the adult
36. What type of body plan allows a cnidarian to swim freely?
a. Medusa
37. What type of body plan does a sea anemone have?
a. Polyp
38. Through what does a cnidarian expel its undigested food?
a. Mouth
39. What is the rocklike part of a coral reef made up of?
a. Hard skeletons of coral
40. What group of worms do planarians belong to?
a. Flatworms
41. How does a coral reef form?
a. A polyp undergoes asexual reproduction over and over, eventually reproducing millions of coral polyps.
42. What is a parasite?
a. An organism that lives inside a host
43. Where do wastes exit in a roundworm?
a. Anus
44. How do earthworms improve the soil?
a. By loosening soil and fertilizing it with its wastes
45. What are the three stages of food digestion?
a. Food breakdown, ingestion, and elimination of wastes
46. What is an adaptation?
a. A structure or behavior that allows an animal to perform a basic function it its environment
47. What is a closed circulatory system?
a. Blood moves only through tubes called blood vessels
48. Be able to identify and describe the body plan of a jellyfish.
a. Bowl shaped medusa
49. Be able to identify a planarian and tell how it lives. (Free-living or parasitic)
a. Free-living
50. Be able to identify a sponge and describe how it gets food.
a. It filters food particles that pas through its body
51. Be able to identify an earthworm and tell what features distinguish it from other worms.
a. Bodies made up of segmented parts
52. Be able to identify the type of symmetry the animals in questions 48-51 exhibit.
a. Jelly fish-radial symmetry
b. Planarian an earthworm- bilateral symmetry

53. If you find a worm in the soil, how can you tell which of the three major phyla of worms it belongs to?

54. Describe asexual and sexual reproduction. How do offspring produced by asexual reproduction differ from those reproduced by sexual reproduction.