CH.9 Vocabulary test review

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Across
  1. 3. body plan in which an organism can be divided into two parts that are nearly mirror images of each other
  2. 4. the organ that exchanges carbon dioxide for oxygen in water
  3. 6. special tissue that produces milk for young mammals
  4. 11. an internal rigid framework that supports humans and other animals
  5. 12. the animal that survives by living inside or on another organism, gets food from the organism, and does not help in the organism’s survival/organism that lives on or in a host organism and gets its food from its host
  6. 13. a stinging capsular organelle of the tentacle of a cnidarian (such as a box jellyfish or sea anemone) that contains a coiled, hollow, usually barbed, venomous thread that is discharged especially for catching prey and defending against enemies
  7. 15. an inherited trait that increases an organism’s chances of surviving and reproducing in its environment
  8. 16. fluid-filled internal cavity surrounded by muscle tissue
  9. 18. to fasten
  10. 20. a thin layer of tissue that covers a mollusk’s internal organs
  11. 21. an animal that generates body heat from the inside
Down
  1. 1. body plan that can be divided into two parts that are nearly mirror images of each other anywhere through the central axis
  2. 2. a process in which the body form of an animal changes as it grows from an egg to an adult
  3. 5. body plan that cannot be divided into any two parts that are nearly mirror images of each other
  4. 6. the process of shedding and replacing an outer covering
  5. 7. small, flat, rigid external body covering
  6. 8. groove along the side of a developing chordate that will develop into other body structures
  7. 9. a group of organisms with similar traits and able to produce fertile offspring
  8. 10. an animal that heats its body with heat from the environment
  9. 13. the flexible rod-shaped structure that supports the body of a developing chordate
  10. 14. the protective membrane surrounding an embryo
  11. 17. thick, hard outer covering that protects crabs and other animals
  12. 19. any bristle or bristle-like appendage, or stiff hair in invertebrates and some plants. The bristles or setae help anchor and control the worm when moving through the soil. The bristles hold a section of the worm firmly into the ground while the other part of the body protrudes forward.