Survey of Marine Animals

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Across
  1. 4. an organism that possesses both male and female reproductive organs or can produce both male and female gametes,
  2. 5. refers to the free-swimming, umbrella-shaped body form of certain cnidarians, like jellyfish, that contrasts with the sessile polyp form.
  3. 7. a body plan where parts are arranged symmetrically around a central axis, allowing the organism to be divided into similar halves by any plane passing through the center
  4. 9. a tough, flexible connective tissue that provides support and protection to various parts of the body
  5. 13. a non-cancerous growth that protrudes from the surface of an organ or tissue.
  6. 14. an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
  7. 15. anything related to or occurring on the bottom of a body of water, including the sediment surface and sub-surface layers
  8. 17. modified sweat glands that produce and secrete milk for nourishing infants or young mammals
  9. 19. an organ that forms in the womb, also called the uterus
  10. 20. animals that neither develop nor retain a vertebral column
  11. 21. a loss of plumage, skin, or hair, especially as a regular feature of an animal's life cycle.
Down
  1. 1. a gas-filled organ in bony fish that helps them regulate buoyancy and maintain depth without expending extra energy
  2. 2. an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
  3. 3. the property of being divisible into symmetrical halves on either side of a unique plane.
  4. 6. a type of egg that are characterized by the presence of several protective membranes, known as the amniotic membranes, which surround and support the developing embryo
  5. 8. a hard, external covering that supports and protects the bodies of some animals, like insects, crustaceans, and mollusks
  6. 10. lack of equality or equivalence between parts or aspects of something; lack of symmetry.
  7. 11. having or developing buds.
  8. 12. a unique hydraulic system found in echinoderms (like starfish and sea urchins) that functions in locomotion, feeding, respiration, and waste removal, using a network of fluid-filled canals and tube feet
  9. 16. dependent on or capable of the internal generation of heat.
  10. 18. animals whose body temperature fluctuates with their environment, relying on external sources for heat regulation