Across
- 2. an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
- 4. A symmetry in which the sides exhibit correspondence or regularity of parts around a central axis.
- 5. A form of asexual reproduction in which a new individual develops from some generative anatomical point of the parent organism.
- 7. Lack of equality or equivalence between parts or aspects of something; lack of symmetry.
- 13. a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
- 16. An organism that has both kinds of reproductive organs and can produce both gametes associated with male and female sexes.
- 17. a chemical reaction that absorbs energy
- 18. a non-vascular type of supporting connective tissue that is found throughout the body
- 19. One of two principal body forms occurring in members of the animal phylum Cnidaria.
Down
- 1. Glandular organ located on the chest.
- 3. any so-called cold-blooded animal
- 6. An animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc.
- 8. A form of symmetry in which the opposite sides are similar.
- 9. located in the body cavity and is derived from an outpocketing of the digestive tube.
- 10. an organ that connects the developing fetus to the uterine wall, thereby allowing nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.
- 11. A form of cnidarian in which the body is shaped like an umbrella.
- 12. rigid or articulated envelope that supports and protects the soft tissues of certain animals.
- 14. An air-breathing egg characterized by a shell and extraembryonic membranes.
- 15. organisms at the bottom of freshwater bodies of water, such as lakes, rivers, and streams.